Emrakul, the Promised End [Eldritch Moon] Phyrexian Demon if Mana Vault is tapped

if Mana Vault is tapped

Flashback—Sacrifice a creature

Serra Ascendant gets +5/+5 and has flying

{T}: Each nontoken permanent with a name originally printed in the Antiquities expansion is sacrificed by its controller

The truth of Ezuri's legacy is clouded by the fog of legend

Emrakul, the Promised End [Eldritch Moon] Phyrexian Demon if Mana Vault is tappedSet: Eldritch Moon Type: Legendary Creature Eldrazi Rarity: Mythic Cost: {13} This spell costs {1} less to cast for each card type among cards in your graveyard. When you cast this spell, you gain control of target opponent during that player's next turn. After that turn, that player takes an extra turn. Flying, trample, protection from instants An enigma as vexing as life itself.