There is a new mode to get shaman rooms. Just like vanilla or bootcamp, simply add the word "shaman" into your room name and it will be a shaman room.
Mice fall from heights or if you drop things on their heads.
Post all your bugs about it in this thread.

I'll start with the following:
Sometimes the shaman also dies when he falls from heights etc, sometimes he doesn't. I wasn't able to figure out what exactly causes this bug but in one round I died when I dropped an anvil on myself, in the next one I didn't.

edit: this one seems to be fixed

I'd imagine that depend on the distance as well as impact of the fall, since the shaman should still be allowed to jump and whatnot.
Though it wouldn't hurt to have an easier way to tell which falls are lethal.

I went sure that in my cases it doesn't depend on the impact force, it definetely was a "yes you can die" vs "no you can't die" difference in the rounds.

Also, this map: @317521 makes mice and shams spawn at the hole which is located in the air. When you drop down it results in an insta death.