Ulamog, the Ceaseless Hunger [Commander Masters] Dorinthea Hero Deck Each other creature becomes a

Each other creature becomes a copy of that creature until end of turn

Athreos isn't a creature

Set: Skyridge Type: Fire Rarity: Rare Retreat cost: Colorless

Set: Promo Finish: Rainbow Foil Type: Action Rarity: Promo Class: Runeblade Cost: 0 Aurora Specialization (You may only have this in your deck if your hero is Aurora

Ulamog, the Ceaseless Hunger [Commander Masters] Dorinthea Hero Deck Each other creature becomes aSet: Commander Masters Type: Legendary Creature Eldrazi Rarity: Mythic Cost: {10} A force as voracious as time itself. When you cast this spell, exile two target permanents. Indestructible Whenever Ulamog, the Ceaseless Hunger attacks, defending player exiles the top twenty cards of their library.