Ancient Cellarspawn Extended Art 47 (Commander: Duskmourn: House of Horror) - Extended Art

Each spell you cast that's a Demon, Horror, or Nightmare costs {1} less to cast. Whenever you cast a spell, if the amount of mana spent to cast it was less than its mana value, target opponent loses life equal to the difference.

NM - $12.80
LP - $10.30
MP - $7.70
HP - $5.20
DMG - $2.60