Well, I decided to start using up-ramps to remove the layers around my central living section, having fun designing with multilevel appearance in mind.
A bunch of unicorns roamed onto the map and got chased into my cage traps by the kea corpses, how delightful, into the happythoughts room you go!
I even got a skeletal one to put in the depot area to release on jerky merchants, along with several undead elves which I use to make more undead elves.
Hmmm, I started trying to use pressurized water from fortifications branched off of my drainage system to flush some of the corpses towards the non-reanimating parts of the caverns, haven't checked on that in a while.
Let's give it a look see...
Oh good, looks like the crundles are all congregating around the mist generator I sorta accidentally made, how nice for the-
...oh come on, seriously? The undead crundles are enjoying the waterfall I made?
Hmmm, maybe that forgotten beast will help clear them out, ah there he is!
Awesome, go rip those undead crundles to... oh for the love of blood and gore, seriously?
The caverns belong to the dead now, my drain did move most of the corpses away from the reanimating portion of the map, but when I tried to do the same in the second cavern it reduced the pressure and turned it into a mist generator for undead horrors... which fits since the place IS named Cuddlehorrors.