Wall of Flesh

The Wall of Flesh makes its first appearance in the episode "Tree Trunks," when it was first stepped on by Finn, Jake, and Tree Trunks in its home in the Evil Forest. It soon rose up from the ground and barricaded their path. Finn and Jake began punching it with no effect, while Tree Trunks, thinking that the Wall of Flesh needed some "tender love and care," put stickers on it: a rainbow, a scratch-and-sniff pickle, and a holographic unicorn (without a horn). The Wall of Flesh got angry and picked up Tree Trunks, preparing to eat her. Finn noticed what was going on and sliced off the Wall's arm, saving Tree Trunks. The Wall melted and retreated into a tree, though it is unlikely that Finn killed it.

Appearance
The Wall of flesh is a gooey substance that can form itself into a wall. It has two eyes. One is next to its mouth, while the other is on the part of the creature that is on the ground. It also has one mouth. It is peach colored.