Corpse Dance [Tempest] Kaladesh Inventions where X is the greatest

where X is the greatest power among creatures you control

Set: EX: Unseen Forces Type: Metal Rarity: Ultra Rare Retreat cost: Colorless

Discard a card: Witch-king of Angmar gains indestructible until end of turn

"Take a moment

At the beginning of your end step

Corpse Dance [Tempest] Kaladesh Inventions where X is the greatestSet: Tempest Type: Instant Rarity: Rare Cost: {2}{B} Buyback {2} (You may pay an additional {2} as you cast this spell. If you do, put this card into your hand as it resolves.) Return the top creature card of your graveyard to the battlefield. That creature gains haste until end of turn. Exile it at the beginning of the next end step.