|The following information is from the Adventure Time comic book series. It may not be part of the same canon or continuity as the animated series.|
Corn Syrup Wizard is a character who appeared in Issue 12 of the Adventure Time comic book series. He registers to take part in the wizard battle being organized by Finn, Jake and Marceline during their search for Ewlbo. He was apparently responsible for messing up Marceline's pies, so she beats him up when he appears at the registration.
Corn Syrup Wizard is a strange-looking orange blob of what is presumably corn syrup. He wears a red cloak and has a blue gem attached to a belt around his neck.