Triskaidekaphile is a rare Creature — Human Wizard card from Innistrad: Midnight Hunt Promos (PMID), collector number 81p. Current market price: $1.50 (foil $1.85), TCGplayer market prices via Scryfall.
You have no maximum hand size. At the beginning of your upkeep, if you have exactly thirteen cards in your hand, you win the game. {3}{U}: Draw a card.