What are all the mythic enemies?

[Golem]

Slimed by Steiger

I’m walking through the forest, feeling the happiness that comes from having the Accomplished Perk. Completed Feats popping up every where! Plowing through the monsters on my way to my second perk, a Feat pops up! Monster Horde! I take them out and before I can feel the happiness again…Monster Horde # 2! I blast them away, and before I know it…Monster Horde #3! A big slime! takes a few seconds to die, it’s tougher than the weaker Hordes that came before, and I am feeling good, until…Monster Hord…