Jormag, the Whisperer

Flying
When Jormag, the Whisperer enters the battlefield
gain control of target creature an opponent
controls and put a champion counter on it.
Creatures with champion counters assign combat damage to their owner as they weren't blocked. Whenever a creature with a champion counter
deals combat damage to it's owner return it to
it's owner and draw a card.
Creatures blocking or blocked by Jormag get -2/-2 until the end of turn.