Corpse Dance is a rare Instant card from Tempest (TMP), collector number 116. Current market price: $33.08, TCGplayer market prices via Scryfall.
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.