Electro, Assaulting Battery 76 (Marvel's Spider-Man)

Flying You don't lose unspent red mana as steps and phases end. Whenever you cast an instant or sorcery spell, add {R}. When Electro leaves the battlefield, you may pay {X}. When you do, he deals X damage to target player.

NM - $9.90
LP - $7.90
MP - $5.90
HP - $4.00
DMG - $2.00