As Foretold is a mythic Enchantment card from Amonkhet Remastered (AKR), collector number 49.
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.