Feature Requests - Challenges, Biomes, 1.19 mobs + blocks

[voigtman]

Biome + Challenges:

(1) Convert Biome GUI to work similar to Challenges GUI where those Biomes available to the player are enabled and visible whereas those unavailable are hidden.
(2) Biomes earned through challenges or granted via permissions automatically become enabled and visible within GUI

Deep Dark Biome

What would the benefit / use be? Maybe permanent darkness effect when entering biome that dissipates when leaving?

Challenges

Add Deep Dark Biome and Skulk Blocks as earnable via challenges

Allay

Control Allay from stealing from neighboring islands.

Warden

How can the Warden appear and/or be used on Skyblock without being a total pain?