Treant

Treant is a large tree monster at the end of Trial Forest. He is generally not a challenge to most players, though new players may have a bit of trouble with him. His attacks are 2 swipes and an apple throw if you're too far away. His only special attack is imobilizing you with vines which is very easy to avoid if the player jumps.

As a minor joke, many claim he is impossible to beat. Keep in mind this is just a joke, though.