Tree Spirit

Tree Spirits are hostile mobs that spawn within the Plains, Forest, and Mountain Biomes of the Overworld. It is a melee mob that will knock the player into the air at a varying height if he/she gets hit. It is also immune to the knockback enchant. This mob takes up a 3x3x4 area.

Trivia

 * Even though it is called Tree Spirit, if the player wants to spawn it, he/she must type in "Ent" instead, which is also what this mob can be called, since Ent is a word used for giant living trees in many popular works of fiction/folklore.