Indiora Doom Volt the Cubic Emperor

Select 3 "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 gains 800 original ATK for each monster stacked underneath it. When this card is destroyed, you can return this card to your hand to Special Summon the "Cubic Seed" monsters stacked underneath it to your field.