Biker Gang's Hammer Wielder (TSR-018 N) [The Battle at the Sacred Ruins]

[Bloodlust] [Pierce] [Enter] This card deals 300 damage multiplied by the combined number of magic stones each player controls without a magic stone type to each player. If your opponent's weather is pollution, repeat this process once. [Solo Mode] You pay 1 less to play this card if you control a Werefox J/ruler. This card cannot be canceled as long as your opponent controls a magic stone without a magic stone type.