Vulcan Dragni the Cubic King

Select 2 "Cubic Seed" monsters you control, stack them on top of each other, and stack this card on top of them to Special Summon this card. This effect can be activated during the Battle Phase. When this card is Special Summoned, inflict 800 damage to your opponent.This card gain 800 original ATK for each monster stacked underneath it. After this card battled, return it to the Deck to add 1 "Indiora Doom Volt the Cubic Emperor" from your Deck to your hand. During this turn, Special Summon the "Cubic Seed" monsters stacked underneath this card to your field.