Buff Kirby

Succ - At the beginning of your upkeep, you may exile target nontoken creature. If you do, return each other creature exiled with Buff Kirby to the battlefield under that creature's owner's control.
Copy - As long as a creature card is exiled with Buff Kirby, its power is equal to twice the exiled card's power and it's toughness is equal to twice the exiled card's toughness.