You can Tribute this card from your hand or field; take 1 "Photon" monster and 1 "Galaxy" monster from your Deck, add 1 of them to your hand, and send the other to the GY, also you cannot Special Summon for the rest of this turn, except LIGHT monsters. If a "Galaxy-Eyes" monster(s) is Special Summoned to your field (except during the Damage Step): You can Special Summon this card from your GY, but banish it when it leaves the field. You can only use each effect of "Galaxy Defense Robot Orbital 7" once per turn.