Elemental Hero Grandmerge [DUPO-EN004] Ultra Rare

2 "HERO" Normal Monsters Must be Fusion Summoned. Gains ATK/DEF equal to the combined original Levels of the materials used for its Fusion Summon x 300. When this card destroys an opponent's monster by battle: You can Tribute this card; Special Summon 1 "Elemental HERO" Fusion Monster from your Extra Deck, ignoring its Summoning conditions, but it cannot attack monsters with an equal or lower Level than it.