As Foretold is a rare Enchantment card from Doctor Who (WHO), collector number 469. Current market price: $1.14 (foil $1.25), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, put a time counter on this enchantment. Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on this enchantment.