As Foretold 68 (Wilds of Eldraine: Enchanting Tales)

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.

NM - $7.30
LP - $5.90
MP - $4.40
HP - $3.00
DMG - $1.50