diff --git a/src/client/Client.js b/src/client/Client.js
index a28beb2e8082..5b68e45afcd6 100644
--- a/src/client/Client.js
+++ b/src/client/Client.js
@@ -236,7 +236,7 @@ class Client extends BaseClient {
     );
 
     if (this.options.presence) {
-      this.options.ws.presence = await this.presence._parse(this.options.presence);
+      this.options.ws.presence = this.presence._parse(this.options.presence);
     }
 
     this.emit(Events.DEBUG, 'Preparing to connect to the gateway...');
@@ -284,12 +284,10 @@ class Client extends BaseClient {
    *   .then(invite => console.log(`Obtained invite with code: ${invite.code}`))
    *   .catch(console.error);
    */
-  fetchInvite(invite) {
+  async fetchInvite(invite) {
     const code = DataResolver.resolveInviteCode(invite);
-    return this.api
-      .invites(code)
-      .get({ query: { with_counts: true, with_expiration: true } })
-      .then(data => new Invite(this, data));
+    const data = await this.api.invites(code).get({ query: { with_counts: true, with_expiration: true } });
+    return new Invite(this, data);
   }
 
   /**
@@ -301,12 +299,10 @@ class Client extends BaseClient {
    *   .then(template => console.log(`Obtained template with code: ${template.code}`))
    *   .catch(console.error);
    */
-  fetchGuildTemplate(template) {
+  async fetchGuildTemplate(template) {
     const code = DataResolver.resolveGuildTemplateCode(template);
-    return this.api.guilds
-      .templates(code)
-      .get()
-      .then(data => new GuildTemplate(this, data));
+    const data = await this.api.guilds.templates(code).get();
+    return new GuildTemplate(this, data);
   }
 
   /**
@@ -319,11 +315,9 @@ class Client extends BaseClient {
    *   .then(webhook => console.log(`Obtained webhook with name: ${webhook.name}`))
    *   .catch(console.error);
    */
-  fetchWebhook(id, token) {
-    return this.api
-      .webhooks(id, token)
-      .get()
-      .then(data => new Webhook(this, { token, ...data }));
+  async fetchWebhook(id, token) {
+    const data = await this.api.webhooks(id, token).get();
+    return new Webhook(this, { token, ...data });
   }
 
   /**
@@ -334,12 +328,11 @@ class Client extends BaseClient {
    *   .then(regions => console.log(`Available regions are: ${regions.map(region => region.name).join(', ')}`))
    *   .catch(console.error);
    */
-  fetchVoiceRegions() {
-    return this.api.voice.regions.get().then(res => {
-      const regions = new Collection();
-      for (const region of res) regions.set(region.id, new VoiceRegion(region));
-      return regions;
-    });
+  async fetchVoiceRegions() {
+    const apiRegions = await this.api.voice.regions.get();
+    const regions = new Collection();
+    for (const region of apiRegions) regions.set(region.id, new VoiceRegion(region));
+    return regions;
   }
 
   /**
@@ -433,13 +426,11 @@ class Client extends BaseClient {
    * @param {GuildResolvable} guild The guild to fetch the preview for
    * @returns {Promise<GuildPreview>}
    */
-  fetchGuildPreview(guild) {
+  async fetchGuildPreview(guild) {
     const id = this.guilds.resolveId(guild);
     if (!id) throw new TypeError('INVALID_TYPE', 'guild', 'GuildResolvable');
-    return this.api
-      .guilds(id)
-      .preview.get()
-      .then(data => new GuildPreview(this, data));
+    const data = await this.api.guilds(id).preview.get();
+    return new GuildPreview(this, data);
   }
 
   /**
diff --git a/src/managers/GuildEmojiManager.js b/src/managers/GuildEmojiManager.js
index 6be10c7237d1..6c1c689db58c 100644
--- a/src/managers/GuildEmojiManager.js
+++ b/src/managers/GuildEmojiManager.js
@@ -65,10 +65,8 @@ class GuildEmojiManager extends BaseGuildEmojiManager {
       }
     }
 
-    return this.client.api
-      .guilds(this.guild.id)
-      .emojis.post({ data, reason })
-      .then(emoji => this.client.actions.GuildEmojiCreate.handle(this.guild, emoji).emoji);
+    const emoji = await this.client.api.guilds(this.guild.id).emojis.post({ data, reason });
+    return this.client.actions.GuildEmojiCreate.handle(this.guild, emoji).emoji;
   }
 
   /**
diff --git a/src/managers/GuildManager.js b/src/managers/GuildManager.js
index 7d8535da7702..c4a7c9c3abf6 100644
--- a/src/managers/GuildManager.js
+++ b/src/managers/GuildManager.js
@@ -195,45 +195,42 @@ class GuildManager extends CachedManager {
     }
     if (systemChannelFlags) systemChannelFlags = SystemChannelFlags.resolve(systemChannelFlags);
 
-    return new Promise((resolve, reject) =>
-      this.client.api.guilds
-        .post({
-          data: {
-            name,
-            icon,
-            verification_level: verificationLevel,
-            default_message_notifications: defaultMessageNotifications,
-            explicit_content_filter: explicitContentFilter,
-            roles,
-            channels,
-            afk_channel_id: afkChannelId,
-            afk_timeout: afkTimeout,
-            system_channel_id: systemChannelId,
-            system_channel_flags: systemChannelFlags,
-          },
-        })
-        .then(data => {
-          if (this.client.guilds.cache.has(data.id)) return resolve(this.client.guilds.cache.get(data.id));
+    const data = await this.client.api.guilds.post({
+      data: {
+        name,
+        icon,
+        verification_level: verificationLevel,
+        default_message_notifications: defaultMessageNotifications,
+        explicit_content_filter: explicitContentFilter,
+        roles,
+        channels,
+        afk_channel_id: afkChannelId,
+        afk_timeout: afkTimeout,
+        system_channel_id: systemChannelId,
+        system_channel_flags: systemChannelFlags,
+      },
+    });
 
-          const handleGuild = guild => {
-            if (guild.id === data.id) {
-              clearTimeout(timeout);
-              this.client.removeListener(Events.GUILD_CREATE, handleGuild);
-              this.client.decrementMaxListeners();
-              resolve(guild);
-            }
-          };
-          this.client.incrementMaxListeners();
-          this.client.on(Events.GUILD_CREATE, handleGuild);
+    if (this.client.guilds.cache.has(data.id)) return this.client.guilds.cache.get(data.id);
 
-          const timeout = setTimeout(() => {
-            this.client.removeListener(Events.GUILD_CREATE, handleGuild);
-            this.client.decrementMaxListeners();
-            resolve(this.client.guilds._add(data));
-          }, 10000).unref();
-          return undefined;
-        }, reject),
-    );
+    return new Promise(resolve => {
+      const handleGuild = guild => {
+        if (guild.id === data.id) {
+          clearTimeout(timeout);
+          this.client.removeListener(Events.GUILD_CREATE, handleGuild);
+          this.client.decrementMaxListeners();
+          resolve(guild);
+        }
+      };
+      this.client.incrementMaxListeners();
+      this.client.on(Events.GUILD_CREATE, handleGuild);
+
+      const timeout = setTimeout(() => {
+        this.client.removeListener(Events.GUILD_CREATE, handleGuild);
+        this.client.decrementMaxListeners();
+        resolve(this.client.guilds._add(data));
+      }, 10000).unref();
+    });
   }
 
   /**
diff --git a/src/managers/GuildMemberManager.js b/src/managers/GuildMemberManager.js
index defced96937d..d5c7292e97c7 100644
--- a/src/managers/GuildMemberManager.js
+++ b/src/managers/GuildMemberManager.js
@@ -277,8 +277,8 @@ class GuildMemberManager extends CachedManager {
    *    .then(pruned => console.log(`I just pruned ${pruned} people!`))
    *    .catch(console.error);
    */
-  prune({ days = 7, dry = false, count: compute_prune_count = true, roles = [], reason } = {}) {
-    if (typeof days !== 'number') return Promise.reject(new TypeError('PRUNE_DAYS_TYPE'));
+  async prune({ days = 7, dry = false, count: compute_prune_count = true, roles = [], reason } = {}) {
+    if (typeof days !== 'number') throw new TypeError('PRUNE_DAYS_TYPE');
 
     const query = { days };
     const resolvedRoles = [];
@@ -286,7 +286,7 @@ class GuildMemberManager extends CachedManager {
     for (const role of roles) {
       const resolvedRole = this.guild.roles.resolveId(role);
       if (!resolvedRole) {
-        return Promise.reject(new TypeError('INVALID_ELEMENT', 'Array', 'options.roles', role));
+        throw new TypeError('INVALID_ELEMENT', 'Array', 'options.roles', role);
       }
       resolvedRoles.push(resolvedRole);
     }
@@ -297,16 +297,11 @@ class GuildMemberManager extends CachedManager {
 
     const endpoint = this.client.api.guilds(this.guild.id).prune;
 
-    if (dry) {
-      return endpoint.get({ query, reason }).then(data => data.pruned);
-    }
+    const { pruned } = await (dry
+      ? endpoint.get({ query, reason })
+      : endpoint.post({ data: { ...query, compute_prune_count }, reason }));
 
-    return endpoint
-      .post({
-        data: { ...query, compute_prune_count },
-        reason,
-      })
-      .then(data => data.pruned);
+    return pruned;
   }
 
   /**
@@ -366,17 +361,14 @@ class GuildMemberManager extends CachedManager {
     return this.guild.bans.remove(user, reason);
   }
 
-  _fetchSingle({ user, cache, force = false }) {
+  async _fetchSingle({ user, cache, force = false }) {
     if (!force) {
       const existing = this.cache.get(user);
-      if (existing && !existing.partial) return Promise.resolve(existing);
+      if (existing && !existing.partial) return existing;
     }
 
-    return this.client.api
-      .guilds(this.guild.id)
-      .members(user)
-      .get()
-      .then(data => this._add(data, cache));
+    const data = await this.client.api.guilds(this.guild.id).members(user).get();
+    return this._add(data, cache);
   }
 
   _fetchMany({
diff --git a/src/managers/GuildStickerManager.js b/src/managers/GuildStickerManager.js
index b8c15517dd30..bffb0b397a1d 100644
--- a/src/managers/GuildStickerManager.js
+++ b/src/managers/GuildStickerManager.js
@@ -57,10 +57,10 @@ class GuildStickerManager extends CachedManager {
 
     const data = { name, tags, description: description ?? '' };
 
-    return this.client.api
+    const sticker = await this.client.api
       .guilds(this.guild.id)
-      .stickers.post({ data, files: [file], reason, dontUsePayloadJSON: true })
-      .then(sticker => this.client.actions.GuildStickerCreate.handle(this.guild, sticker).sticker);
+      .stickers.post({ data, files: [file], reason, dontUsePayloadJSON: true });
+    return this.client.actions.GuildStickerCreate.handle(this.guild, sticker).sticker;
   }
 
   /**
diff --git a/src/managers/MessageManager.js b/src/managers/MessageManager.js
index 4f61ab1516dc..7ac9dcad29fb 100644
--- a/src/managers/MessageManager.js
+++ b/src/managers/MessageManager.js
@@ -80,12 +80,11 @@ class MessageManager extends CachedManager {
    *   .then(messages => console.log(`Received ${messages.size} messages`))
    *   .catch(console.error);
    */
-  fetchPinned(cache = true) {
-    return this.client.api.channels[this.channel.id].pins.get().then(data => {
-      const messages = new Collection();
-      for (const message of data) messages.set(message.id, this._add(message, cache));
-      return messages;
-    });
+  async fetchPinned(cache = true) {
+    const data = await this.client.api.channels[this.channel.id].pins.get();
+    const messages = new Collection();
+    for (const message of data) messages.set(message.id, this._add(message, cache));
+    return messages;
   }
 
   /**
diff --git a/src/managers/PermissionOverwriteManager.js b/src/managers/PermissionOverwriteManager.js
index 4bd4337195b6..cadb4890b21f 100644
--- a/src/managers/PermissionOverwriteManager.js
+++ b/src/managers/PermissionOverwriteManager.js
@@ -54,7 +54,9 @@ class PermissionOverwriteManager extends CachedManager {
    */
   set(overwrites, reason) {
     if (!Array.isArray(overwrites) && !(overwrites instanceof Collection)) {
-      throw new TypeError('INVALID_TYPE', 'overwrites', 'Array or Collection of Permission Overwrites', true);
+      return Promise.reject(
+        new TypeError('INVALID_TYPE', 'overwrites', 'Array or Collection of Permission Overwrites', true),
+      );
     }
     return this.channel.edit({ permissionOverwrites: overwrites, reason });
   }
@@ -81,7 +83,7 @@ class PermissionOverwriteManager extends CachedManager {
     let { type, reason } = overwriteOptions;
     if (typeof type !== 'number') {
       userOrRole = this.channel.guild.roles.resolve(userOrRole) ?? this.client.users.resolve(userOrRole);
-      if (!userOrRole) return Promise.reject(new TypeError('INVALID_TYPE', 'parameter', 'User nor a Role'));
+      if (!userOrRole) throw new TypeError('INVALID_TYPE', 'parameter', 'User nor a Role');
       type = userOrRole instanceof Role ? OverwriteTypes.role : OverwriteTypes.member;
     }
 
diff --git a/src/managers/ReactionManager.js b/src/managers/ReactionManager.js
index 771e05416400..57e7c0022487 100644
--- a/src/managers/ReactionManager.js
+++ b/src/managers/ReactionManager.js
@@ -57,12 +57,9 @@ class ReactionManager extends CachedManager {
    * Removes all reactions from a message.
    * @returns {Promise<Message>}
    */
-  removeAll() {
-    return this.client.api
-      .channels(this.message.channel.id)
-      .messages(this.message.id)
-      .reactions.delete()
-      .then(() => this.message);
+  async removeAll() {
+    await this.client.api.channels(this.message.channel.id).messages(this.message.id).reactions.delete();
+    return this.message;
   }
 }
 
diff --git a/src/managers/ReactionUserManager.js b/src/managers/ReactionUserManager.js
index 625aff2a5b42..5fc2147021e8 100644
--- a/src/managers/ReactionUserManager.js
+++ b/src/managers/ReactionUserManager.js
@@ -57,15 +57,14 @@ class ReactionUserManager extends CachedManager {
    * @param {UserResolvable} [user=this.client.user] The user to remove the reaction of
    * @returns {Promise<MessageReaction>}
    */
-  remove(user = this.client.user) {
+  async remove(user = this.client.user) {
     const userId = this.client.users.resolveId(user);
-    if (!userId) return Promise.reject(new Error('REACTION_RESOLVE_USER'));
+    if (!userId) throw new Error('REACTION_RESOLVE_USER');
     const message = this.reaction.message;
-    return this.client.api.channels[message.channel.id].messages[message.id].reactions[this.reaction.emoji.identifier][
+    await this.client.api.channels[message.channel.id].messages[message.id].reactions[this.reaction.emoji.identifier][
       userId === this.client.user.id ? '@me' : userId
-    ]
-      .delete()
-      .then(() => this.reaction);
+    ].delete();
+    return this.reaction;
   }
 }
 
diff --git a/src/managers/RoleManager.js b/src/managers/RoleManager.js
index 65b675278853..211f96f30c9d 100644
--- a/src/managers/RoleManager.js
+++ b/src/managers/RoleManager.js
@@ -118,31 +118,27 @@ class RoleManager extends CachedManager {
    *   .then(console.log)
    *   .catch(console.error);
    */
-  create(options = {}) {
+  async create(options = {}) {
     let { name, color, hoist, permissions, position, mentionable, reason } = options;
     if (color) color = resolveColor(color);
     if (typeof permissions !== 'undefined') permissions = new Permissions(permissions);
 
-    return this.client.api
-      .guilds(this.guild.id)
-      .roles.post({
-        data: {
-          name,
-          color,
-          hoist,
-          permissions,
-          mentionable,
-        },
-        reason,
-      })
-      .then(r => {
-        const { role } = this.client.actions.GuildRoleCreate.handle({
-          guild_id: this.guild.id,
-          role: r,
-        });
-        if (position) return role.setPosition(position, reason);
-        return role;
-      });
+    const data = await this.client.api.guilds(this.guild.id).roles.post({
+      data: {
+        name,
+        color,
+        hoist,
+        permissions,
+        mentionable,
+      },
+      reason,
+    });
+    const { role } = this.client.actions.GuildRoleCreate.handle({
+      guild_id: this.guild.id,
+      role: data,
+    });
+    if (position) return role.setPosition(position, reason);
+    return role;
   }
 
   /**
diff --git a/src/managers/ThreadMemberManager.js b/src/managers/ThreadMemberManager.js
index a8b6498286f6..deff230d7974 100644
--- a/src/managers/ThreadMemberManager.js
+++ b/src/managers/ThreadMemberManager.js
@@ -74,13 +74,11 @@ class ThreadMemberManager extends CachedManager {
    * @param {string} [reason] The reason for adding this member
    * @returns {Promise<Snowflake>}
    */
-  add(member, reason) {
+  async add(member, reason) {
     const id = member === '@me' ? member : this.client.users.resolveId(member);
-    if (!id) return Promise.reject(new TypeError('INVALID_TYPE', 'member', 'UserResolvable'));
-    return this.client.api
-      .channels(this.thread.id, 'thread-members', id)
-      .put({ reason })
-      .then(() => id);
+    if (!id) throw new TypeError('INVALID_TYPE', 'member', 'UserResolvable');
+    await this.client.api.channels(this.thread.id, 'thread-members', id).put({ reason });
+    return id;
   }
 
   /**
@@ -89,11 +87,9 @@ class ThreadMemberManager extends CachedManager {
    * @param {string} [reason] The reason for removing this member from the thread
    * @returns {Promise<Snowflake>}
    */
-  remove(id, reason) {
-    return this.client.api
-      .channels(this.thread.id, 'thread-members', id)
-      .delete({ reason })
-      .then(() => id);
+  async remove(id, reason) {
+    await this.client.api.channels(this.thread.id, 'thread-members', id).delete({ reason });
+    return id;
   }
 
   /**
diff --git a/src/sharding/Shard.js b/src/sharding/Shard.js
index e732686ef643..334331c66027 100644
--- a/src/sharding/Shard.js
+++ b/src/sharding/Shard.js
@@ -106,7 +106,7 @@ class Shard extends EventEmitter {
    * before resolving (`-1` or `Infinity` for no wait)
    * @returns {Promise<ChildProcess>}
    */
-  async spawn(timeout = 30000) {
+  spawn(timeout = 30000) {
     if (this.process) throw new Error('SHARDING_PROCESS_EXISTS', this.id);
     if (this.worker) throw new Error('SHARDING_WORKER_EXISTS', this.id);
 
@@ -137,7 +137,7 @@ class Shard extends EventEmitter {
     this.emit('spawn', child);
 
     if (timeout === -1 || timeout === Infinity) return child;
-    await new Promise((resolve, reject) => {
+    return new Promise((resolve, reject) => {
       const cleanup = () => {
         clearTimeout(spawnTimeoutTimer);
         this.off('ready', onReady);
@@ -147,7 +147,7 @@ class Shard extends EventEmitter {
 
       const onReady = () => {
         cleanup();
-        resolve();
+        resolve(child);
       };
 
       const onDisconnect = () => {
@@ -170,7 +170,6 @@ class Shard extends EventEmitter {
       this.once('disconnect', onDisconnect);
       this.once('death', onDeath);
     });
-    return child;
   }
 
   /**
diff --git a/src/structures/Guild.js b/src/structures/Guild.js
index 2ceefb279972..7b33352f7cc5 100644
--- a/src/structures/Guild.js
+++ b/src/structures/Guild.js
@@ -556,13 +556,9 @@ class Guild extends AnonymousGuild {
    * Resolves with a collection mapping templates by their codes.
    * @returns {Promise<Collection<string, GuildTemplate>>}
    */
-  fetchTemplates() {
-    return this.client.api
-      .guilds(this.id)
-      .templates.get()
-      .then(templates =>
-        templates.reduce((col, data) => col.set(data.code, new GuildTemplate(this.client, data)), new Collection()),
-      );
+  async fetchTemplates() {
+    const templates = await this.client.api.guilds(this.id).templates.get();
+    return templates.reduce((col, data) => col.set(data.code, new GuildTemplate(this.client, data)), new Collection());
   }
 
   /**
@@ -580,22 +576,18 @@ class Guild extends AnonymousGuild {
    * @param {string} [description] The description for the template
    * @returns {Promise<GuildTemplate>}
    */
-  createTemplate(name, description) {
-    return this.client.api
-      .guilds(this.id)
-      .templates.post({ data: { name, description } })
-      .then(data => new GuildTemplate(this.client, data));
+  async createTemplate(name, description) {
+    const data = await this.client.api.guilds(this.id).templates.post({ data: { name, description } });
+    return new GuildTemplate(this.client, data);
   }
 
   /**
    * Obtains a guild preview for this guild from Discord.
    * @returns {Promise<GuildPreview>}
    */
-  fetchPreview() {
-    return this.client.api
-      .guilds(this.id)
-      .preview.get()
-      .then(data => new GuildPreview(this.client, data));
+  async fetchPreview() {
+    const data = await this.client.api.guilds(this.id).preview.get();
+    return new GuildPreview(this.client, data);
   }
 
   /**
@@ -637,15 +629,11 @@ class Guild extends AnonymousGuild {
    *   .then(webhooks => console.log(`Fetched ${webhooks.size} webhooks`))
    *   .catch(console.error);
    */
-  fetchWebhooks() {
-    return this.client.api
-      .guilds(this.id)
-      .webhooks.get()
-      .then(data => {
-        const hooks = new Collection();
-        for (const hook of data) hooks.set(hook.id, new Webhook(this.client, hook));
-        return hooks;
-      });
+  async fetchWebhooks() {
+    const apiHooks = await this.client.api.guilds(this.id).webhooks.get();
+    const hooks = new Collection();
+    for (const hook of apiHooks) hooks.set(hook.id, new Webhook(this.client, hook));
+    return hooks;
   }
 
   /**
@@ -713,21 +701,19 @@ class Guild extends AnonymousGuild {
    *   .then(audit => console.log(audit.entries.first()))
    *   .catch(console.error);
    */
-  fetchAuditLogs(options = {}) {
+  async fetchAuditLogs(options = {}) {
     if (options.before && options.before instanceof GuildAuditLogs.Entry) options.before = options.before.id;
     if (typeof options.type === 'string') options.type = GuildAuditLogs.Actions[options.type];
 
-    return this.client.api
-      .guilds(this.id)
-      ['audit-logs'].get({
-        query: {
-          before: options.before,
-          limit: options.limit,
-          user_id: this.client.users.resolveId(options.user),
-          action_type: options.type,
-        },
-      })
-      .then(data => GuildAuditLogs.build(this, data));
+    const data = await this.client.api.guilds(this.id)['audit-logs'].get({
+      query: {
+        before: options.before,
+        limit: options.limit,
+        user_id: this.client.users.resolveId(options.user),
+        action_type: options.type,
+      },
+    });
+    return GuildAuditLogs.build(this, data);
   }
 
   /**
@@ -781,7 +767,7 @@ class Guild extends AnonymousGuild {
    *   .then(updated => console.log(`New guild name ${updated}`))
    *   .catch(console.error);
    */
-  edit(data, reason) {
+  async edit(data, reason) {
     const _data = {};
     if (data.name) _data.name = data.name;
     if (typeof data.verificationLevel !== 'undefined') {
@@ -830,10 +816,8 @@ class Guild extends AnonymousGuild {
       _data.description = data.description;
     }
     if (data.preferredLocale) _data.preferred_locale = data.preferredLocale;
-    return this.client.api
-      .guilds(this.id)
-      .patch({ data: _data, reason })
-      .then(newData => this.client.actions.GuildUpdate.handle(newData).updated);
+    const newData = await this.client.api.guilds(this.id).patch({ data: _data, reason });
+    return this.client.actions.GuildUpdate.handle(newData).updated;
   }
 
   /**
@@ -1158,7 +1142,7 @@ class Guild extends AnonymousGuild {
    *   .then(guild => console.log(`Updated channel positions for ${guild}`))
    *   .catch(console.error);
    */
-  setChannelPositions(channelPositions) {
+  async setChannelPositions(channelPositions) {
     const updatedChannels = channelPositions.map(r => ({
       id: this.client.channels.resolveId(r.channel),
       position: r.position,
@@ -1166,16 +1150,11 @@ class Guild extends AnonymousGuild {
       parent_id: typeof r.parent !== 'undefined' ? this.channels.resolveId(r.parent) : undefined,
     }));
 
-    return this.client.api
-      .guilds(this.id)
-      .channels.patch({ data: updatedChannels })
-      .then(
-        () =>
-          this.client.actions.GuildChannelsPositionUpdate.handle({
-            guild_id: this.id,
-            channels: updatedChannels,
-          }).guild,
-      );
+    await this.client.api.guilds(this.id).channels.patch({ data: updatedChannels });
+    return this.client.actions.GuildChannelsPositionUpdate.handle({
+      guild_id: this.id,
+      channels: updatedChannels,
+    }).guild;
   }
 
   /**
@@ -1194,7 +1173,7 @@ class Guild extends AnonymousGuild {
    *  .then(guild => console.log(`Role positions updated for ${guild}`))
    *  .catch(console.error);
    */
-  setRolePositions(rolePositions) {
+  async setRolePositions(rolePositions) {
     // Make sure rolePositions are prepared for API
     rolePositions = rolePositions.map(o => ({
       id: this.roles.resolveId(o.role),
@@ -1202,18 +1181,13 @@ class Guild extends AnonymousGuild {
     }));
 
     // Call the API to update role positions
-    return this.client.api
-      .guilds(this.id)
-      .roles.patch({
-        data: rolePositions,
-      })
-      .then(
-        () =>
-          this.client.actions.GuildRolesPositionUpdate.handle({
-            guild_id: this.id,
-            roles: rolePositions,
-          }).guild,
-      );
+    await this.client.api.guilds(this.id).roles.patch({
+      data: rolePositions,
+    });
+    return this.client.actions.GuildRolesPositionUpdate.handle({
+      guild_id: this.id,
+      roles: rolePositions,
+    }).guild;
   }
 
   /**
@@ -1222,17 +1196,15 @@ class Guild extends AnonymousGuild {
    * @param {string} [reason] Reason for changing the guild's widget settings
    * @returns {Promise<Guild>}
    */
-  setWidgetSettings(settings, reason) {
-    return this.client.api
-      .guilds(this.id)
-      .widget.patch({
-        data: {
-          enabled: settings.enabled,
-          channel_id: this.channels.resolveId(settings.channel),
-        },
-        reason,
-      })
-      .then(() => this);
+  async setWidgetSettings(settings, reason) {
+    await this.client.api.guilds(this.id).widget.patch({
+      data: {
+        enabled: settings.enabled,
+        channel_id: this.channels.resolveId(settings.channel),
+      },
+      reason,
+    });
+    return this;
   }
 
   /**
@@ -1244,13 +1216,10 @@ class Guild extends AnonymousGuild {
    *   .then(g => console.log(`Left the guild ${g}`))
    *   .catch(console.error);
    */
-  leave() {
-    if (this.ownerId === this.client.user.id) return Promise.reject(new Error('GUILD_OWNED'));
-    return this.client.api
-      .users('@me')
-      .guilds(this.id)
-      .delete()
-      .then(() => this.client.actions.GuildDelete.handle({ id: this.id }).guild);
+  async leave() {
+    if (this.ownerId === this.client.user.id) throw new Error('GUILD_OWNED');
+    await this.client.api.users('@me').guilds(this.id).delete();
+    return this.client.actions.GuildDelete.handle({ id: this.id }).guild;
   }
 
   /**
@@ -1262,11 +1231,9 @@ class Guild extends AnonymousGuild {
    *   .then(g => console.log(`Deleted the guild ${g}`))
    *   .catch(console.error);
    */
-  delete() {
-    return this.client.api
-      .guilds(this.id)
-      .delete()
-      .then(() => this.client.actions.GuildDelete.handle({ id: this.id }).guild);
+  async delete() {
+    await this.client.api.guilds(this.id).delete();
+    return this.client.actions.GuildDelete.handle({ id: this.id }).guild;
   }
 
   /**
diff --git a/src/structures/GuildAuditLogs.js b/src/structures/GuildAuditLogs.js
index f4f097f873e4..c600c2931fdd 100644
--- a/src/structures/GuildAuditLogs.js
+++ b/src/structures/GuildAuditLogs.js
@@ -198,9 +198,10 @@ class GuildAuditLogs {
    * Handles possible promises for entry targets.
    * @returns {Promise<GuildAuditLogs>}
    */
-  static build(...args) {
+  static async build(...args) {
     const logs = new GuildAuditLogs(...args);
-    return Promise.all(logs.entries.map(e => e.target)).then(() => logs);
+    await Promise.all(logs.entries.map(e => e.target));
+    return logs;
   }
 
   /**
@@ -500,19 +501,17 @@ class GuildAuditLogsEntry {
           ),
         );
     } else if (targetType === Targets.INVITE) {
-      this.target = guild.members.fetch(guild.client.user.id).then(me => {
+      this.target = guild.members.fetch(guild.client.user.id).then(async me => {
         if (me.permissions.has(Permissions.FLAGS.MANAGE_GUILD)) {
           let change = this.changes.find(c => c.key === 'code');
           change = change.new ?? change.old;
-          return guild.invites.fetch().then(invites => {
-            this.target = invites.find(i => i.code === change) ?? null;
-          });
+          const invites = await guild.invites.fetch();
+          this.target = invites.find(i => i.code === change) ?? null;
         } else {
           this.target = this.changes.reduce((o, c) => {
             o[c.key] = c.new ?? c.old;
             return o;
           }, {});
-          return this.target;
         }
       });
     } else if (targetType === Targets.MESSAGE) {
diff --git a/src/structures/GuildChannel.js b/src/structures/GuildChannel.js
index 002d372e5a0e..39f7009d7d2b 100644
--- a/src/structures/GuildChannel.js
+++ b/src/structures/GuildChannel.js
@@ -296,18 +296,17 @@ class GuildChannel extends Channel {
     if (data.parent) data.parent = this.client.channels.resolveId(data.parent);
 
     if (typeof data.position !== 'undefined') {
-      await Util.setPosition(
+      const updatedChannels = await Util.setPosition(
         this,
         data.position,
         false,
         this.guild._sortedChannels(this),
         this.client.api.guilds(this.guild.id).channels,
         reason,
-      ).then(updatedChannels => {
-        this.client.actions.GuildChannelsPositionUpdate.handle({
-          guild_id: this.guild.id,
-          channels: updatedChannels,
-        });
+      );
+      this.client.actions.GuildChannelsPositionUpdate.handle({
+        guild_id: this.guild.id,
+        channels: updatedChannels,
       });
     }
 
@@ -389,8 +388,7 @@ class GuildChannel extends Channel {
   setParent(channel, { lockPermissions = true, reason } = {}) {
     return this.edit(
       {
-        // eslint-disable-next-line no-prototype-builtins
-        parent: channel ?? null,
+        parentId: channel?.id ?? channel ?? null,
         lockPermissions,
       },
       reason,
@@ -430,21 +428,20 @@ class GuildChannel extends Channel {
    *   .then(newChannel => console.log(`Channel's new position is ${newChannel.position}`))
    *   .catch(console.error);
    */
-  setPosition(position, { relative, reason } = {}) {
-    return Util.setPosition(
+  async setPosition(position, { relative, reason } = {}) {
+    const updatedChannels = await Util.setPosition(
       this,
       position,
       relative,
       this.guild._sortedChannels(this),
       this.client.api.guilds(this.guild.id).channels,
       reason,
-    ).then(updatedChannels => {
-      this.client.actions.GuildChannelsPositionUpdate.handle({
-        guild_id: this.guild.id,
-        channels: updatedChannels,
-      });
-      return this;
+    );
+    this.client.actions.GuildChannelsPositionUpdate.handle({
+      guild_id: this.guild.id,
+      channels: updatedChannels,
     });
+    return this;
   }
 
   /**
@@ -600,11 +597,9 @@ class GuildChannel extends Channel {
    *   .then(console.log)
    *   .catch(console.error);
    */
-  delete(reason) {
-    return this.client.api
-      .channels(this.id)
-      .delete({ reason })
-      .then(() => this);
+  async delete(reason) {
+    await this.client.api.channels(this.id).delete({ reason });
+    return this;
   }
 }
 
diff --git a/src/structures/GuildEmoji.js b/src/structures/GuildEmoji.js
index 00dd215b30ce..a60ffcd09760 100644
--- a/src/structures/GuildEmoji.js
+++ b/src/structures/GuildEmoji.js
@@ -107,9 +107,9 @@ class GuildEmoji extends BaseGuildEmoji {
    *   .then(e => console.log(`Edited emoji ${e}`))
    *   .catch(console.error);
    */
-  edit(data, reason) {
+  async edit(data, reason) {
     const roles = data.roles?.map(r => r.id ?? r);
-    return this.client.api
+    const newData = await this.client.api
       .guilds(this.guild.id)
       .emojis(this.id)
       .patch({
@@ -118,12 +118,10 @@ class GuildEmoji extends BaseGuildEmoji {
           roles,
         },
         reason,
-      })
-      .then(newData => {
-        const clone = this._clone();
-        clone._patch(newData);
-        return clone;
       });
+    const clone = this._clone();
+    clone._patch(newData);
+    return clone;
   }
 
   /**
@@ -141,12 +139,9 @@ class GuildEmoji extends BaseGuildEmoji {
    * @param {string} [reason] Reason for deleting the emoji
    * @returns {Promise<GuildEmoji>}
    */
-  delete(reason) {
-    return this.client.api
-      .guilds(this.guild.id)
-      .emojis(this.id)
-      .delete({ reason })
-      .then(() => this);
+  async delete(reason) {
+    await this.client.api.guilds(this.guild.id).emojis(this.id).delete({ reason });
+    return this;
   }
 
   /**
diff --git a/src/structures/GuildPreview.js b/src/structures/GuildPreview.js
index 09a206176922..239476fe4896 100644
--- a/src/structures/GuildPreview.js
+++ b/src/structures/GuildPreview.js
@@ -140,14 +140,10 @@ class GuildPreview extends Base {
    * Fetches this guild.
    * @returns {Promise<GuildPreview>}
    */
-  fetch() {
-    return this.client.api
-      .guilds(this.id)
-      .preview.get()
-      .then(data => {
-        this._patch(data);
-        return this;
-      });
+  async fetch() {
+    const data = await this.client.api.guilds(this.id).preview.get();
+    this._patch(data);
+    return this;
   }
 
   /**
diff --git a/src/structures/GuildTemplate.js b/src/structures/GuildTemplate.js
index 09e94c4a4fd1..5a09607e4a92 100644
--- a/src/structures/GuildTemplate.js
+++ b/src/structures/GuildTemplate.js
@@ -109,11 +109,10 @@ class GuildTemplate extends Base {
         icon: await DataResolver.resolveImage(icon),
       },
     });
-    // eslint-disable-next-line consistent-return
-    return new Promise(resolve => {
-      const createdGuild = client.guilds.cache.get(data.id);
-      if (createdGuild) return resolve(createdGuild);
 
+    if (client.guilds.cache.has(data.id)) return client.guilds.cache.get(data.id);
+
+    return new Promise(resolve => {
       const resolveGuild = guild => {
         client.off(Events.GUILD_CREATE, handleGuild);
         client.decrementMaxListeners();
@@ -146,36 +145,27 @@ class GuildTemplate extends Base {
    * @param {EditGuildTemplateOptions} [options] Options for editing the template
    * @returns {Promise<GuildTemplate>}
    */
-  edit({ name, description } = {}) {
-    return this.client.api
-      .guilds(this.guildId)
-      .templates(this.code)
-      .patch({ data: { name, description } })
-      .then(data => this._patch(data));
+  async edit({ name, description } = {}) {
+    const data = await this.client.api.guilds(this.guildId).templates(this.code).patch({ data: { name, description } });
+    return this._patch(data);
   }
 
   /**
    * Deletes this template.
    * @returns {Promise<GuildTemplate>}
    */
-  delete() {
-    return this.client.api
-      .guilds(this.guildId)
-      .templates(this.code)
-      .delete()
-      .then(() => this);
+  async delete() {
+    await this.client.api.guilds(this.guildId).templates(this.code).delete();
+    return this;
   }
 
   /**
    * Syncs this template to the current state of the guild.
    * @returns {Promise<GuildTemplate>}
    */
-  sync() {
-    return this.client.api
-      .guilds(this.guildId)
-      .templates(this.code)
-      .put()
-      .then(data => this._patch(data));
+  async sync() {
+    const data = await this.client.api.guilds(this.guildId).templates(this.code).put();
+    return this._patch(data);
   }
 
   /**
diff --git a/src/structures/Integration.js b/src/structures/Integration.js
index 644882eade17..814846ec0536 100644
--- a/src/structures/Integration.js
+++ b/src/structures/Integration.js
@@ -126,12 +126,9 @@ class Integration extends Base {
    * @returns {Promise<Integration>}
    * @param {string} [reason] Reason for deleting this integration
    */
-  delete(reason) {
-    return this.client.api
-      .guilds(this.guild.id)
-      .integrations(this.id)
-      .delete({ reason })
-      .then(() => this);
+  async delete(reason) {
+    await this.client.api.guilds(this.guild.id).integrations(this.id).delete({ reason });
+    return this;
   }
 
   toJSON() {
diff --git a/src/structures/Invite.js b/src/structures/Invite.js
index 95bad22b21eb..04868284e3a8 100644
--- a/src/structures/Invite.js
+++ b/src/structures/Invite.js
@@ -189,8 +189,9 @@ class Invite extends Base {
    * @param {string} [reason] Reason for deleting this invite
    * @returns {Promise<Invite>}
    */
-  delete(reason) {
-    return this.client.api.invites[this.code].delete({ reason }).then(() => this);
+  async delete(reason) {
+    await this.client.api.invites[this.code].delete({ reason });
+    return this;
   }
 
   /**
diff --git a/src/structures/Message.js b/src/structures/Message.js
index 536b628de8ef..b00da726f2aa 100644
--- a/src/structures/Message.js
+++ b/src/structures/Message.js
@@ -637,8 +637,9 @@ class Message extends Base {
    *   .then(console.log)
    *   .catch(console.error)
    */
-  pin() {
-    return this.channel.messages.pin(this.id).then(() => this);
+  async pin() {
+    await this.channel.messages.pin(this.id);
+    return this;
   }
 
   /**
@@ -650,8 +651,9 @@ class Message extends Base {
    *   .then(console.log)
    *   .catch(console.error)
    */
-  unpin() {
-    return this.channel.messages.unpin(this.id).then(() => this);
+  async unpin() {
+    await this.channel.messages.unpin(this.id);
+    return this;
   }
 
   /**
diff --git a/src/structures/Role.js b/src/structures/Role.js
index 897ad48ced19..4d290243d98f 100644
--- a/src/structures/Role.js
+++ b/src/structures/Role.js
@@ -310,21 +310,20 @@ class Role extends Base {
    *   .then(updated => console.log(`Role position: ${updated.position}`))
    *   .catch(console.error);
    */
-  setPosition(position, { relative, reason } = {}) {
-    return Util.setPosition(
+  async setPosition(position, { relative, reason } = {}) {
+    const updatedRoles = await Util.setPosition(
       this,
       position,
       relative,
       this.guild._sortedRoles(),
       this.client.api.guilds(this.guild.id).roles,
       reason,
-    ).then(updatedRoles => {
-      this.client.actions.GuildRolesPositionUpdate.handle({
-        guild_id: this.guild.id,
-        roles: updatedRoles,
-      });
-      return this;
+    );
+    this.client.actions.GuildRolesPositionUpdate.handle({
+      guild_id: this.guild.id,
+      roles: updatedRoles,
     });
+    return this;
   }
 
   /**
@@ -337,11 +336,10 @@ class Role extends Base {
    *   .then(deleted => console.log(`Deleted role ${deleted.name}`))
    *   .catch(console.error);
    */
-  delete(reason) {
-    return this.client.api.guilds[this.guild.id].roles[this.id].delete({ reason }).then(() => {
-      this.client.actions.GuildRoleDelete.handle({ guild_id: this.guild.id, role_id: this.id });
-      return this;
-    });
+  async delete(reason) {
+    await this.client.api.guilds[this.guild.id].roles[this.id].delete({ reason });
+    this.client.actions.GuildRoleDelete.handle({ guild_id: this.guild.id, role_id: this.id });
+    return this;
   }
 
   /**
diff --git a/src/structures/TextChannel.js b/src/structures/TextChannel.js
index f88060b24fb4..7b0a2df88587 100644
--- a/src/structures/TextChannel.js
+++ b/src/structures/TextChannel.js
@@ -143,12 +143,11 @@ class TextChannel extends GuildChannel {
    *   .then(hooks => console.log(`This channel has ${hooks.size} hooks`))
    *   .catch(console.error);
    */
-  fetchWebhooks() {
-    return this.client.api.channels[this.id].webhooks.get().then(data => {
-      const hooks = new Collection();
-      for (const hook of data) hooks.set(hook.id, new Webhook(this.client, hook));
-      return hooks;
-    });
+  async fetchWebhooks() {
+    const data = await this.client.api.channels[this.id].webhooks.get();
+    const hooks = new Collection();
+    for (const hook of data) hooks.set(hook.id, new Webhook(this.client, hook));
+    return hooks;
   }
 
   /**
@@ -176,15 +175,14 @@ class TextChannel extends GuildChannel {
     if (typeof avatar === 'string' && !avatar.startsWith('data:')) {
       avatar = await DataResolver.resolveImage(avatar);
     }
-    return this.client.api.channels[this.id].webhooks
-      .post({
-        data: {
-          name,
-          avatar,
-        },
-        reason,
-      })
-      .then(data => new Webhook(this.client, data));
+    const data = await this.client.api.channels[this.id].webhooks.post({
+      data: {
+        name,
+        avatar,
+      },
+      reason,
+    });
+    return new Webhook(this.client, data);
   }
 
   // These are here only for documentation purposes - they are implemented by TextBasedChannel
diff --git a/src/structures/ThreadChannel.js b/src/structures/ThreadChannel.js
index ac91157f5c9e..f31af56b9af0 100644
--- a/src/structures/ThreadChannel.js
+++ b/src/structures/ThreadChannel.js
@@ -212,16 +212,18 @@ class ThreadChannel extends Channel {
    * Makes the client user join the thread.
    * @returns {Promise<ThreadChannel>}
    */
-  join() {
-    return this.members.add('@me').then(() => this);
+  async join() {
+    await this.members.add('@me');
+    return this;
   }
 
   /**
    * Makes the client user leave the thread.
    * @returns {Promise<ThreadChannel>}
    */
-  leave() {
-    return this.members.remove('@me').then(() => this);
+  async leave() {
+    await this.members.remove('@me');
+    return this;
   }
 
   /**
@@ -444,11 +446,9 @@ class ThreadChannel extends Channel {
    *   .then(deletedThread => console.log(deletedThread))
    *   .catch(console.error);
    */
-  delete(reason) {
-    return this.client.api
-      .channels(this.id)
-      .delete({ reason })
-      .then(() => this);
+  async delete(reason) {
+    await this.client.api.channels(this.id).delete({ reason });
+    return this;
   }
 
   // These are here only for documentation purposes - they are implemented by TextBasedChannel
diff --git a/src/structures/ThreadMember.js b/src/structures/ThreadMember.js
index 526334455a44..147f603f76c6 100644
--- a/src/structures/ThreadMember.js
+++ b/src/structures/ThreadMember.js
@@ -87,8 +87,9 @@ class ThreadMember extends Base {
    * @param {string} [reason] Reason for removing the member
    * @returns {ThreadMember}
    */
-  remove(reason) {
-    return this.thread.members.remove(this.id, reason).then(() => this);
+  async remove(reason) {
+    await this.thread.members.remove(this.id, reason);
+    return this;
   }
 }
 
diff --git a/src/structures/Webhook.js b/src/structures/Webhook.js
index 61960bcdb996..5fe1d78f0942 100644
--- a/src/structures/Webhook.js
+++ b/src/structures/Webhook.js
@@ -166,15 +166,13 @@ class Webhook {
     }
 
     const { data, files } = await messagePayload.resolveFiles();
-    return this.client.api
-      .webhooks(this.id, this.token)
-      .post({
-        data,
-        files,
-        query: { thread_id: messagePayload.options.threadId, wait: true },
-        auth: false,
-      })
-      .then(d => this.client.channels?.cache.get(d.channel_id)?.messages._add(d, false) ?? d);
+    const d = await this.client.api.webhooks(this.id, this.token).post({
+      data,
+      files,
+      query: { thread_id: messagePayload.options.threadId, wait: true },
+      auth: false,
+    });
+    return this.client.channels?.cache.get(d.channel_id)?.messages._add(d, false) ?? d;
   }
 
   /**
@@ -195,17 +193,15 @@ class Webhook {
    * }).catch(console.error);
    * @see {@link https://api.slack.com/messaging/webhooks}
    */
-  sendSlackMessage(body) {
+  async sendSlackMessage(body) {
     if (!this.token) throw new Error('WEBHOOK_TOKEN_UNAVAILABLE');
 
-    return this.client.api
-      .webhooks(this.id, this.token)
-      .slack.post({
-        query: { wait: true },
-        auth: false,
-        data: body,
-      })
-      .then(data => data.toString() === 'ok');
+    const data = await this.client.api.webhooks(this.id, this.token).slack.post({
+      query: { wait: true },
+      auth: false,
+      data: body,
+    });
+    return data.toString() === 'ok';
   }
 
   /**
diff --git a/src/structures/interfaces/Application.js b/src/structures/interfaces/Application.js
index 4518d63a31a4..2dad85da9b0d 100644
--- a/src/structures/interfaces/Application.js
+++ b/src/structures/interfaces/Application.js
@@ -92,17 +92,13 @@ class Application extends Base {
    * Gets the application's rich presence assets.
    * @returns {Promise<Array<ApplicationAsset>>}
    */
-  fetchAssets() {
-    return this.client.api.oauth2
-      .applications(this.id)
-      .assets.get()
-      .then(assets =>
-        assets.map(a => ({
-          id: a.id,
-          name: a.name,
-          type: AssetTypes[a.type - 1],
-        })),
-      );
+  async fetchAssets() {
+    const assets = await this.client.api.oauth2.applications(this.id).assets.get();
+    return assets.map(a => ({
+      id: a.id,
+      name: a.name,
+      type: AssetTypes[a.type - 1],
+    }));
   }
 
   /**
diff --git a/src/structures/interfaces/TextBasedChannel.js b/src/structures/interfaces/TextBasedChannel.js
index de4d2bc24f73..dee00b89f494 100644
--- a/src/structures/interfaces/TextBasedChannel.js
+++ b/src/structures/interfaces/TextBasedChannel.js
@@ -155,7 +155,8 @@ class TextBasedChannel {
     const GuildMember = require('../GuildMember');
 
     if (this instanceof User || this instanceof GuildMember) {
-      return this.createDM().then(dm => dm.send(options));
+      const dm = await this.createDM();
+      return dm.send(options);
     }
 
     let messagePayload;
diff --git a/src/util/Util.js b/src/util/Util.js
index 44fc59f49829..4f7561f08b70 100644
--- a/src/util/Util.js
+++ b/src/util/Util.js
@@ -267,19 +267,19 @@ class Util extends null {
    * @param {FetchRecommendedShardsOptions} [options] Options for fetching the recommended shard count
    * @returns {Promise<number>} The recommended number of shards
    */
-  static fetchRecommendedShards(token, { guildsPerShard = 1000, multipleOf = 1 } = {}) {
+  static async fetchRecommendedShards(token, { guildsPerShard = 1000, multipleOf = 1 } = {}) {
     if (!token) throw new DiscordError('TOKEN_MISSING');
     const defaults = Options.createDefault();
-    return fetch(`${defaults.http.api}/v${defaults.http.version}${Endpoints.botGateway}`, {
+    const response = await fetch(`${defaults.http.api}/v${defaults.http.version}${Endpoints.botGateway}`, {
       method: 'GET',
       headers: { Authorization: `Bot ${token.replace(/^Bot\s*/i, '')}` },
-    })
-      .then(res => {
-        if (res.ok) return res.json();
-        if (res.status === 401) throw new DiscordError('TOKEN_INVALID');
-        throw res;
-      })
-      .then(data => Math.ceil((data.shards * (1000 / guildsPerShard)) / multipleOf) * multipleOf);
+    });
+    if (!response.ok) {
+      if (response.status === 401) throw new DiscordError('TOKEN_INVALID');
+      throw response;
+    }
+    const { shards } = await response.json();
+    return Math.ceil((shards * (1000 / guildsPerShard)) / multipleOf) * multipleOf;
   }
 
   /**
@@ -500,11 +500,12 @@ class Util extends null {
    * @returns {Promise<Channel[]|Role[]>} Updated item list, with `id` and `position` properties
    * @private
    */
-  static setPosition(item, position, relative, sorted, route, reason) {
+  static async setPosition(item, position, relative, sorted, route, reason) {
     let updatedItems = [...sorted.values()];
     Util.moveElementInArray(updatedItems, item, position, relative);
     updatedItems = updatedItems.map((r, i) => ({ id: r.id, position: i }));
-    return route.patch({ data: updatedItems, reason }).then(() => updatedItems);
+    await route.patch({ data: updatedItems, reason });
+    return updatedItems;
   }
 
   /**