It's funny how something as simple as the terrifying mutant tree having Speed 2 instills a sense of dread on all its own. I don't want to picture that! Really fun and fascinating design. I like a lot of it. I will second what ohartenstein23 siad and say I don't really get the "Endless Mirth" part from most of its design, despite the ability names. Also, half-damage triggers on solos can feel really bad, and Friend or Foe probably deserves to cost more Malice. I dig the inclusion of extra adds in the fight, and the overall flavor here is quite unsettling. Great job!