Zyyyx, Prismatic Rift

You may chose not to untap Zyyyx, Prismatic Rift during your untap step.
{t}: Add {c}.
{t}, Sacrifice 2 lands: Destroy target land.
{t}, {w}{w}{u}{u}{b}{b}{r}{r}{g}{g}: All other permanents become 0/1 creatures called Fluffy Bunnies for as long as Zyyyx remains tapped.