Hariki, the Restless Night

Shroud, menace
Whenever a creature you control deals combat
damage to a player, you may discard a card. If
you do, that player discards a card, then if you
don't own that creature, draw a card.
{3}{u}{b}, {t}: Gain control of target tapped
creature. Untap it. The next time it becomes
untapped, its owner gains control of it.