Niko, Destiny Defier

+1: Target player creates a Shard token. Exile a creature that player controls until that Shard leaves the battlefield.
-3: Exile up to 3 creatures. Return them to the battlefield under their owner's control at the beginning of the next end step.
-5: Create a Shard token for each creature your opponents control. The Shards created this way become copies of different creatures you don't control