Four Knocks is a rare Enchantment card from Doctor Who (WHO), collector number 625. Current market price: — (foil $1.00), TCGplayer market prices via Scryfall.
Vanishing 4 (This enchantment enters with four time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.) At the beginning of your first main phase, draw a card.