As Foretold
Enchantment
(CMC 3)
At the beginning of your upkeep, put a time counter on this enchantment.
Once each turn, you may pay 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.
- [PAKH] Amonkhet Promos #42s (M)