Corpse Dance [Tempest] Rabiah You lose the game when

You lose the game when that creature leaves the battlefield

Set: Invasion Type: Legendary Creature — Merfolk Noble Rarity: Rare Cost: {3}{U}{U} {U}{U}

If those permanents are exchanged this way

"I see something special in you—a bright ember that yearns to dance among the stars

Corpse Dance [Tempest] Rabiah You lose the game whenSet: 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.