Valkyrion the Magna Warrior (WC4-E001) - World Championship 2004: GBA Promo Unlimited

This card can only be Special Summoned by offering "Alpha the Magnet Warrior", "Beta the Magnet Warrior", and "Gamma the Magnet Warrior" from your hand or the field as a Tribute. If "Alpha the Magnet Warrior", "Beta the Magnet Warrior", and "Gamma the Magnet Warrior" exist in the Graveyard, you can offer this card as a Tribute to Special Summon these 3 cards to the field.