Dretch

They smell like rotten eggs. The stench is so bad that those with a weak stomach might throw up...

Thanks to Ezra, I know that they are not of the natural world and are probably resistant to some forms of damage. She tried shooting at it with a flaming arrow, but it's not really bothered by it. My starry form can do full radiant damage and acid damage seems to work as well.

When they die, they turn into a foul smelling puddle of ... Well... I don't know what.