Regex syntax question

[ammnt]

Hello,

i want to block all subdomains blog. for all domains and create this rule:
/blog.*/

In this case also blocked subdomains like:
blogs.
blogger.
blogging.
domain.blog.com
test.blogs.net.co
etc.

How do I properly write a regular expression to avoid this? How do I properly write a regular expression to avoid this?

Thank you.

[ameshkov]

Do you really need regex for this?

Why not ||blog. ?

[ammnt]

Do you really need regex for this?

Why not ||blog. ?

Thanks for the answer, but I 'm not sure... I ask about regular expressions as Pi-Hole supports something similar:
https://raw.githubusercontent.com/mmotti/pihole-regex/master/regex.list

[ameshkov]

I am not a fan of regular expressions.

Prefer adblock-style syntax when it's possible. It is easier to use and it will work much faster than regular expressions:
https://github.com/AdguardTeam/AdGuardHome/wiki/Hosts-Blocklists