Raise an Army

Put 5 2/2 black Zombie soldier tokens onto the battlefield.
Buyback: {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Flashback {7}{b}{b}: Put 10 2/2 black Zombie soldier tokens onto the battlefield. (You may cast this card from your graveyard for its flashback cost. Then exile it.)