Me and my friends are in a server and are trying to find an Anceint city, we have this mod installed and saw it, but it seemed there was no recipe, and we can't find any info on it, can someone please help?

It’s loot in mob spawner rooms, chance 1/32.
And yes, wiki is still planned, sorry :D

So like mob dungeons and stuff? Sorry if I seem silly- Just really confused.

Yes. Where the mob spawners are :)