Patch was a creature that was created by Melnrath. He guarded the top of Deathrattle Keep against intruders.
Patch was the amalgamation of a behir, manticore, guardian naga, pyrohydra, blue dragon, white dragon, and gold dragon. The creature had six legs and the tail of a manticore. It had one blue dragon wing and one white dragon wing. It had the head of a behir, guardian naga, blue dragon, white dragon, pyrohydra, and a gold dragon. The creature also appears to have had arcane abilities of the associated creatures.
The creature was slain by the heroes on the top of the keep.