8. Tigerstripe Zantrios is a jerk.
This incredibly aggressive monster gave my team a tough time. Think of it as a four-legged cross between a horned dinosaur and an amphibian creature. Its tricks include spitting globs of paralyzing goo and firing a rapid stream of water right from its kisser. When not in its four-legged stance, it can inflate itself at any point and begin rolling over and pouncing on top of everyone in its path.
Even with 15 minutes on the clock and a group of four people, I was unable to beat this punk. I'll at least give credit to its inventive design.