You can reveal 1 Number Xyz Monster in your Extra Deck; Special Summon this card from your hand. If you do, this card s Level becomes the revealed monster s Rank, also while it is face-up in the Monster Zone, you cannot Special Summon monsters from the Extra Deck, except Number Xyz Monsters. You can only use this effect of Astral Kuriboh once per turn. A Number Xyz Monster that was Summoned using this card on the field as material gains this effect.
• Cannot be destroyed by battle or your opponent s card effects.