كوريبو النجمي

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