Charnel Serenade is a rare Sorcery card from Murders at Karlov Manor Commander (MKC), collector number 336. Current market price: $0.37, TCGplayer market prices via Scryfall.
Surveil 3, then return a creature card from your graveyard to the battlefield with a finality counter on it. Exile Charnel Serenade with three time counters on it. Suspend 3—{2}{B} (Rather than cast this card from your hand, you may pay {2}{B} and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)