Cannot be destroyed by battle except with "Number" monsters. Once per turn: You can Special Summon a number of "Number" monsters from your Extra Deck equal to the number of Xyz Materials attached to this card, but their effects are negated, and if you do, detach 1 Xyz Material from this card. While you control another "Number" monster, this card cannot be destroyed, it is unaffected by your opponent's card effects, also you take no damage. During your End Phase: Destroy monsters your opponent controls, up to the number of "Number" monsters that were destroyed on your side of the field this turn. When this card you control is destroyed by your opponent's monster: Gain control of that monster.