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. This card gains 1000 original ATK for each monster stacked underneath it. This card can attack twice during each Battle Phase. If this card destroys a monster by battle, you can return this card to your Deck to add 1 "Buster Gundil the Cubic Behemoth" from your Deck to your hand. In addition, Special Summon the "Cubic Seed" monsters underneath this card to your field.