When this card is Summoned: You can Special Summon up to 2 ""Ra's Disciple"" from your hand or Deck. Cannot be Tributed, except for the Tribute Summon of ""Obelisk the Tormentor"", ""Slifer the Sky Dragon"" or ""The Winged Dragon of Ra"". You cannot Special Summon monsters, except by the effect of ""Ra's Disciple"".