As Foretold is a rare Enchantment card from Wilds of Eldraine: Enchanting Tales (WOT), collector number 68. Current market price: $2.93 (foil $9.58), 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.