Memory Vampire is a rare Creature — Vampire Detective card from Ravnica: Clue Edition (CLU), collector number 38. Current market price: $0.32, TCGplayer market prices via Scryfall.
Flying Whenever this creature deals combat damage to a player, any number of target players each mill that many cards. Then you may collect evidence 9. When you do, you may cast target nonland card from defending player's graveyard without paying its mana cost.