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

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 - $10.00
LP - $8.00
MP - $6.00
HP - $4.00
DMG - $2.00