Try a magical vault. I found this today and will be adding it next time I’m looking for a good lair for a coven. From matomibotaki.
coven
There are 2 posts tagged coven (this is page 1 of 1).
I Found a Coven Lot Trait!
I didn’t think to look for something like this. I just found it by chance while trying to find another Witch mod. Its a great idea.
Take a look at the Spellcaster Covenstead Lot Trait from Simularity.
You may also like (some require community lots):
Tranquil Graveyard and Tranquil Cemetery.
Possessed Ground Lot Trait and Challenge
Aspirations includes a Mad Scientist and Ultimate Adventurer. Take a look at the careers and Sim traits if you want more like these. I didn’t want to link to everything I ended up downloading. I did pick several but I’m especially looking forward to the coven lot trait.