How to redirect all subdomains to main domain

I purchased a website with hundreds of subdomains which i would like to redirect to a root domain.

blabla1.domain.com
123something.domain.com
123abc.domain.com
etc...

I want this all redirect to domain.com

What is an easiest way to do this?

may be try

server_name *.domain.com;
return 301 http://domain.com$request_uri;

I would use Cloudflare and create ONE pagerule to forward from:

*.domain.com/*

To:

https://domain.com/$2

This would simplify the SSL management a lot, since you wouldn't have to deal with wildcards.