As Foretold [Amonkhet]

Set Name:	Amonkhet
Rarity, #:	Mythic, 42
Card Type:	Enchantment
Description:	At the beginning of your upkeep, put a time counter on As Foretold. Once each turn, you may pay 0 rather than pay the mana cost for a spell you cast with converted mana cost X or less, where X is the number of time counters on As Foretold.