Did this spawn after we found it....
First lvl
gore fiends and vampire bats. first lvl, easy

Second lvl
flesh golems and dark wisps. dark wisps are no joke, mess you up if you get too many on you/dont pay attention

Levers
not sure what they do but you can switch em on and off, maybe someone can shed some light?

Third lvl
i forgot to take a pic, i know im pretty bad at this. wrights and undead gargoyles. wrights are pretty cool looking but a pretty tough mob, best to use undead slayers and fire spells for this lvl
Fourth lvl
dream wraiths and skeletal drakes. wraiths are awsome looking but cast on you a ton and have a bit of hp. skeletal drakes best taken down with reptile slayers

Champ
Primeval Lich. Actually pretty easy compared to the other new champ. Let a dragon tank him and just go to town. Undead slayers again.

Loot put in our packs upon his death
