Gagaga Girl (YS13-EN010) - Super Starter: V for Victory 1st Edition

You can target 1 face-up "Gagaga Magician" you control; this card's Level becomes the Level of that monster. An Xyz Monster that was Summoned using only this card and other "Gagaga" monsters as Xyz Material gains this effect. ? When it is Xyz Summoned: You can target 1 Special Summoned monster your opponent controls; its ATK becomes 0.