Materiactor Gigaboros

[ Dragon / Xyz / Effect ] 2+ Level 3 monsters Gains 500 ATK/DEF for each card in your hand. You can only use each of the following effects of "Materiactor Gigaboros" once per turn. You can detach 1 material from this card; attach 1 "Materiactor" monster from your Deck to this card as material. During your opponent's Main or Battle Phase (Quick Effect): You can add 1 card attached to this card to the hand. ATK/ 500 DEF/ 500