If this card is in your hand or GY, and you control a Level 8 or higher Dragon Synchro Monster: You can Special Summon this card, but banish it when it leaves the field. You can Tribute this card; Special Summon up to 2 Level 1 LIGHT Dragon monsters from your hand and or GY, except Stardust Wurm , but their effects cannot be activated. You can only use each effect of Stardust Wurm once per turn.