Looking for a certain custom story

[FlawlessHappiness]

More details. Allthough, speaking of cult people I can only think of The Great Work. If that's what you mean, you cannot use those enemies, as they are a property of their creator, Crisosphinx.

why cant he? he needs to ask though, to get premission.

It may specify in the mod's readme or similar files "Please do not use my assets". While we cannot prevent that, the least we can try is honor it.

To not let people down, but also without giving false hope, I think it'd be a good idea to actually check out the CS to figure out what it says.