Endgame / goal?

[tenth10th]

Maybe the stairs lead up, and you're trying to get out of the dungeon?

(You spend a lot of time controlling monsters - maybe human adventurers are the main obstacle to getting out?)

(It's hard to possess an adventurer / hero character, but that's the ideal body?)

(Maybe your final score is based on the kind of body you can escape with?)

(Maybe monsters/heroes can shake off your possession after a while?)

(Or there are enemies (Clerics / Paladins / Priests) that can kick you out of your current body? And banish or "turn" you as a Ghost?)

(Rare items or equipment that help you control or maintain control over bodies? Like, maybe if you possess a fighter, you want to equip cursed items on the body to make them easier to keep possessed?)

(Other factors to make it hard to hold onto bodies - maybe max HP decreases slowly over time because you're draining the life out of them? especially as your ghost levels up?)

(Spooky Ghost Powers for high level Ghosts?!)