And then, once the party has gotten some levels on them from killing all of the plague spreading, mutated, mossy fiends, they encounter a thornshade.
Muahahahahaha!
There really needs to be an evil face emote.
I got the image of a Large thornshade with a patch of hollow haunter-infested pumpkins on its back... now I want to try that out, but my players are only level 1.