Its his "spoon" to stir the hobo gravy and get to the chunks. Similar to Star's wand, its a conduit which allows him to use magical force. He's a natural "dip downer" and has mastered the art of silent casting as well. Alot of these are pretty recent developments, as we got to see him out by himself for once. He's quite skilled. I guess that's why he's been beside the Butterfly family for generations.