Oh, thats what you mean?! Thats a great idea!I mean the 4 masks of the bosses in the game that majora summoned to fight you. Odolwa, Goht, Gyorg and Twinmold where their names. I think that maybe for a down B he can summon them to help him. They can fly around and take cheap shots just like in the final boss fight.
I'm guessing you'd have SK summon a particular mask at random?
I'd have each of the four masks attacking in a different way, and lasting for a different amount of time.
One mask shoots a beam for , say 5 seconds.
One mask circles around SK reducing damage for say 10 seconds.
And stuff like that...
Cool idea, man...