Scythe of the Abyssal

{b}, Reveal Scythe of the Abyssal from your hand:
Put a Blood counter on target creature. You lose
2 life.
When Scythe of the Abyssal enters the battlefield, destroy each creature with a Blood counter on it.
{2}, Return Scythe of the Abyssal to it's owners
hand: Return target creature card from your graveyard to your hand.