Investigator's Journal is a rare Artifact — Book Clue card from Innistrad: Double Feature (DBL), collector number 525. Current market price: $0.28 (foil $1.08), TCGplayer market prices via Scryfall.
This artifact enters with a number of suspect counters on it equal to the greatest number of creatures a player controls. {2}, {T}, Remove a suspect counter from this artifact: Draw a card. {2}, Sacrifice this artifact: Draw a card.