The Lich (character)

The Lich King is a villain in Adventure Time. He was first alluded to in the early Adventure Time series pitch, and was the only other character described in those documents in addition to the main six (Finn, Jake, Bubblegum, Rainicorn, Ice King, and Marceline). He has no appearances in season 1 except for the last episode "His Hero". Pen has stated that he will have a far more prominent role in season 2. At the moment, little is known of him except that the legendary hero Billy once fought and defeated him.