مركبة رويد الخارقة المثقاب الضخم

"Steamroid" + "Drillroid" + "Submarineroid"
A Fusion Summon of this card can only be conducted with the above Fusion Material Monsters. During battle between this attacking 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.