Folio of Fancies is a rare Artifact — Book card from Throne of Eldraine Promos (PELD), collector number 46p. Current market price: $4.60 (foil $3.83), TCGplayer market prices via Scryfall.
Players have no maximum hand size. {X}{X}, {T}: Each player draws X cards. {2}{U}, {T}: Each opponent mills cards equal to the number of cards in their hand.