Fateful Absence is a rare Instant card from Innistrad: Midnight Hunt Promos (PMID), collector number 18p. Current market price: $0.65 (foil $0.69), TCGplayer market prices via Scryfall.
Destroy target creature or planeswalker. Its controller investigates. (They create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")