When this card is Synchro Summoned: You can activate this effect; you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except Synchro Monsters, also Special Summon up to 4 Level 2 non-Tuner monsters from your hand and/or Graveyard in Defense Position, but they have their effects negated. You can only use this effect of "Celestial Double Star Shaman" once per turn.