Stormy Gnarl

Destroy target permanent that is exactly the number of colors of mana as was used to cast Stormy Gnarl.
Upcycling {w/u}{b}{b}{b}{r/g}({w/u}{b}{b}{b}{r/g}, Return this card to your hand from exile: Draw a card.)
"Diversification can also become a liability." - Atrinda, Cynod Disciple