Altaria (BW48) (Staff Prerelease Promo) [Black & White: Black Star Promos] Hydra Avatar −8: Put all creature cards

−8: Put all creature cards from all graveyards onto the battlefield under your control

None can tell how many vessels are tangled up on the sea floor—or how much treasure remains unclaimed

Set: Revised Edition Type: Enchantment Rarity: Rare Cost: {1}{U} Players skip their untap steps

Its students graduate the school and enter history

Set: Kaladesh Inventions Type: Artifact Creature — Construct Rarity: Mythic Cost: {3}{G}{G} Trample

Altaria (BW48) (Staff Prerelease Promo) [Black & White: Black Star Promos] Hydra Avatar −8: Put all creature cardsSet: Black & White: Black Star Promos Type: Dragon Rarity: Promo Retreat cost: Colorless