SimpleEntityRemover is an incredibly easy way to prevent specified entities from spawning, as well as killing all live instances of that entity.

CURRENTLY ONLY SUPPORTS 1.20.4

All entities that can be removed can be found here:
https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/entity/EntityType.html

Commands:
/er reload
/er

Permissions
er.reload -> /er reload
er.er -> /er
er.* -> all commands in SimpleEntityRemover

For support or request for another version:
https://discord.com/users/213684069643452416