Elemental Hero Sparkman + Elemental Hero Necroshade This card cannot be Special Summoned except by Fusion Summon. During battle between this card and a Defense Position monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent's Life Points. If this card attacks, it is changed to Defense Position at the end of the Damage Step. If this card is destroyed, destroy 1 monster your opponent controls.