Chaos Ancient Gear Giant [MP24-EN042] Quarter Century Secret Rare

4 "Ancient Gear" monsters
Must be Fusion Summoned and cannot be Special Summoned by other ways. Unaffected by Spell/Trap effects. Your opponent's monsters cannot activate their effects during the Battle Phase. This card can attack all monsters your opponent controls, once each. If this card attacks a Defense Position monster, inflict piercing battle damage to your opponent.