Galaxy Photon

Return 1 “Galaxy” or “Photon” monster from your hand to your Deck and add 1 “Galaxy” or “Photon” Spell/Trap Card from your Deck to your hand. This Skill can only be used if you begin the Duel with a Deck/Extra Deck that contains no monsters other than LIGHT and "Number" monsters. This Skill can only be used once per Duel.