As Foretold

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.

EDHREC rank #1889

USD reference: $1.61 (~₱100.90) · Foil: $3.72 (~₱233.14)