You can Tribute this card; Special Summon 1 "Galaxy-Eyes" monster from your hand or Graveyard, except "Galaxy-Eyes Cloudragon". You can only use this effect of "Galaxy-Eyes Cloudragon" once per turn. If this card is in the Graveyard: You can target 1 "Galaxy-Eyes" Xyz Monster you control; attach this card to it as an Xyz Material. You can only use this effect of "Galaxy-Eyes Cloudragon" once per Duel.