I propose to discuss such things in this thread.
For example, after killing the hag Ethel, I found various potions in her workshop. They can be drunk and give various debuffs.
In the same place, you can put on a special mask and become a pawn of a hag.
There is also a cat at the top of the Moonrise Tower with funny dialogue when you cast Talk to Animals on yourself. It also makes sense to shrink the character and follow her into the hole (I haven't tried it)