Warzone Duplicator (YBRO-030) [Alchemy: The Brothers' War]

Prototype {3} — 3/3
When this creature enters, return target creature an opponent controls with power less than this creature's power to its owner's hand. If that creature wasn't a token, conjure 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."