The Tree of Blight is an evil tree that appears in the episode "Hug Wolf." It spews out its evil spores once every hundred years. Jake burns it down, but in the explosion that follows, a piece of the Tree's flaming remains hits the Alpha Hug Wolf. It possibly leaves its evil mark on her because she turns into the tree at the end of the episode.
The Tree of Blight has the appearance of a blight-stricken tree. It has numerous branches but no leaves. It is completely black and has a green mouth and green eyes.