Kezzi, Riverfang Paragon

Flash
When Kezzi, Riverfang Paragon enters the battlefield, exile target permanent you own.
Kezzi deals damage to target creature or player
equal to that permanent's converted mana cost.
Return that permanent to the battlefield under
your control at the beginning of your end step.
{u/r}{u/r}, discard a card: Return Kezzi to your
hand.