Five Hundred Year Diary is a rare Legendary Artifact — Book Clue card from Doctor Who (WHO), collector number 357. Current market price: $1.17 (foil $1.71), TCGplayer market prices via Scryfall.
Five Hundred Year Diary enters tapped. {T}: Add {U} for each Clue you control. {2}, Sacrifice Five Hundred Year Diary: Draw a card.