Cannot be Normal Summoned Set. Must first be Special Summoned with Max Metalmorph that was activated by Tributing a Level 5 or higher Warrior monster. You can reveal this card in your hand; add 1 card that mentions Max Metalmorph from your Deck to your hand, except Metalflame Swordsman , and if you do, shuffle this card into the Deck. You can only use this effect of Metalflame Swordsman once per turn. Each time your opponent activates a card or effect, this card gains 300 ATK and inflicts 500 damage to your opponent when that card effect resolves.