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[Card Name] Mirror Force Dragon [Type] Fusion/Effect Monster [Attribute] LIGHT [Sub Type] Dragon [ATK] 2800 [DEF] 1200 [Card Text] 
Must be Special Summoned with "The Fang of Critias", using "Mirror Force", and cannot be Special Summoned by other ways. When a monster(s) you control is targeted for an attack or by an opponent's card effect (except during the Damage Step): You can destroy all cards your opponent controls.
Yu-Gi-Oh! Level 8 Monsters - Yu-Gi-Oh! Card Guide
Card Text