Smoke-Cowl Infiltrator

Spy {u}{u} (You may pay an additional {u}{u} as you play this spell. If you do, this creature enters the battlefield under target opponents control.)
If you do not own Smoke-Cowl Infiltrator, other creatures you control are owned by Smoke-Cowl Infiltrator's owner instead of you.
Whenever a creature becomes the target of a spell or ability for the second time each turn, return it to its owner's hand.