2 Link 3 Link Monsters, including at least 1 DARK monster You can also Xyz Summon this card by using "Number 17: Leviathan Dragon" you control as the Xyz Material. (Transfer its Xyz Materials to this card.) If Summoned this way, it cannot attack this turn. Cannot be destroyed by battle, except by "Number" monsters, while cards in your possession are in zones this card points to. Once per turn: You can detach 1 Xyz Material from this card; this card gains 500 ATK for each card in a zone this card points to until the end of this turn.