Grim Reaper, Lethal Legionnaire

Legendary Creature — Human Villain

Whenever Grim Reaper attacks, you may pay 3B. When you do, return target creature card from your graveyard to the battlefield tapped and attacking with a finality counter on it. (If a creature with a finality counter on it would die, exile it instead.)

"The corpses have been sown. Now, to harvest!"