Fateful Absence is a rare Instant card from Innistrad: Midnight Hunt (MID), collector number 18. Current market price: $0.40 (foil $0.44), 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.")