Devolved Getter 2

Getter Rays, Evolve, Trample, Haste.
Devolve.(Creatures opponents control get -1/-1)
{2}: Swap this card with Devolved Getter 1 or Devolved Getter 3 from your hand or library, then shuffle your library. (This does not count as casting a new spell. The swapped creature does not have summoning sickness)