Imminent Doom 98 (Hour of Devastation)

This enchantment enters with a doom counter on it. Whenever you cast a spell with mana value equal to the number of doom counters on this enchantment, this enchantment deals that much damage to any target. Then put a doom counter on this enchantment.

NM - $1.50
LP - $1.50
MP - $1.50
HP - $1.50
DMG - $1.50