Star Rod

The Star Rod is a Rainbow Rarity Magic weapon in the Star 879 Treasure Bag. When it is used, a star will shoot out, dealing damage and creating small rifts that bring enemies (zombies, slimes, bunnies, etc.) to a random area of the world.

Other things
The name is a reference to the Star Rod from Kirby: Nightmare in Dreamland.

You can see the different colors of Star 879's second form on the bottom of the Star Rod.