Laevatein, Generaider Boss of Shadows

[ Fairy / Xyz / Effect ] 2+ Level 9 monsters You can only control 1 "Laevatein, Generaider Boss of Shadows". Monsters your opponent controls lose 1000 ATK/DEF. (Quick Effect): You can Tribute this Xyz Summoned card; Special Summon 1 non-Fairy "Generaider" Xyz Monster from your Extra Deck, then you can attach cards from any field and/or GY(s) to that Special Summoned monster as material, up to the number of materials this card had. ATK/ 2500 DEF/ 2500