Cannot be Normal Summoned/Set. Must first be Special Summoned with «Max Metalmorph» that was activated by Tributing a Level 5 or higher Dragon monster. You can reveal this card in your hand; Set 1 «Metalmorph» Trap from your Deck, and if you do, shuffle this card into the Deck. When your opponent activates a card or effect (Quick Effect): You can negate the activation, then you can inflict damage to your opponent equal to the original ATK of 1 Attack Position monster your opponent controls. You can only use each effect of «Red-Eyes Black Fullmetal Dragon» once per turn.