Herald of Anguish [Aether Revolt Prerelease Promos]Set: Aether Revolt Prerelease Promos Type: Creature Demon Rarity: Mythic Cost: {5}{B}{B} Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Flying At the beginning of your end step, each opponent discards a card. {1}{B}, Sacrifice an artifact: Target creature gets 2 2 until end of turn.