Cannot be destroyed by card effects while it has a "Photon" card as material. You can only use each of the following effects of "Number 90: Galaxy-Eyes Photon Lord" once per turn.
● When an opponent’s monster activates its effect (Quick Effect): You can detach 1 material from this card; negate the activation, then, if the detached material was a "Galaxy" card, destroy that card.
● During your opponent’s turn (Quick Effect): You can take 1 "Photon" or "Galaxy" card from your Deck, and either add it to your hand or attach it to this card as material.