Chaos Ancient Gear Giant (MP24-EN042 QCR)

4 "Ancient Gear" monsters
Must be Fusion Summoned. Unaffected by Spell/Trap effects. Your opponent cannot activate monster effects during the Battle Phase. Can attack all monsters your opponent controls, once each. If this card attacks a Defense Position monster, inflict piercing battle damage to your opponent.
Attribute: DARK
Quarter Century Secret Rare
Monster
From the Yu-Gi-Oh set 25th Anniversary Tin: Dueling Mirrors