Prototype — 3/3 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) When Warzone Duplicator enters the battlefield, return target creature an opponent controls with power less than Warzone Duplicator's power to its owner's hand. If that creature wasn't a token, conjure (A conjured card is added to the game.) a duplicate of it into your hand. It perpetually gains "You may spend mana as though it were mana of any color to cast this spell".