This mod, ahhh, doesn't interact well with mythic mounts. I'm playing with the latest update on 1.18.1- and it spawns hundreds of dragons. No undead- just dragons and slimes. Enough to drop my 200+ fps game to 10.

Yeah uhhh, its defs causing a lot of issues xD

This is happening to me as well with Mythic Mounts. I just did a butcher command to 1100 dragons. I am not sure if its Crimson Moon or Mythic Mounts but please fix.

This should be fixed in the next update for 1.18.1 and 1.18.2 - please give it a try and let me know if it works. You'll be able to blacklist entities in the blacklistModid and blacklistedEntityID config option in the config file (by default, mythic mounts & slimes will be blacklisted). Thank you for the report!