Stardust Wurm

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.