Dark Garnex the Cubic Beast

Special Summon this card by stacking it on top of 1 "Cubic Seed" monster you control. This card gains 1000 original ATK for each monster stacked underneath it. If this card destroys a monster by battle, you can return this card to your Deck to add 1 "Blade Garoodia the Cubic Beast" from your Deck to your hand. In addition, Special Summon the "Cubic Seed" monsters underneath this card to your field.