Snake Colonization

Choose target Snake Creature. Make {x}
copies of that creature.
Buyback {w}{b}{r} (You may pay an additional {w}{b}{r} as you cast this spell. If the buyback cost
was paid, put this spell into its controller's hand
instead of that player's graveyard as it resolves.
Pay {2} instead of {x} if you pay the buyback cost.
After this spell resolves for a second time, exile it.)