Kirby, The Starving Hero

When Kirby, The Starving Hero enters the battlefield you may exile target creature an opponent controls.
Whenever a creature an opponent controls is exiled you may have Kirby become a copy of that card except it has this ability and "{t}: Return all permanents copied by this card to the battlefield under their owner's control. You gain {c} equal to the total converted mana cost of all permanents returned with this effect at the beginning of your next main phase. This card returns to it's origional state.