Sedris, the Traitor King - 193 M ALA

Each creature card in your graveyard has unearth {2}{B}. ({2}{B}: Return the card to the battlefield. The creature gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)
He bids his minions rise from their graves to their knees.
mythic
Legendary Creature — Zombie Warrior
From the Magic: The Gathering set Shards of Alara.