Geira Guile the Cubic King

Special Summon this card by stacking it on top of 1 "Cubic Seed" monster you control. When this card is Special Summoned, inflict 800 damage to your opponent. This card gains 800 original ATK for each monster stacked underneath it. After this card battled, return this card to the Deck to add 1 "Vulcan Dragni the Cubic King" from your Deck to your hand. During this time, Special Summon the "Cubic Seed" monsters stacked underneath this card to your field.