Gagaga Girl

Level 3 DARK/Spellcaster Effect
1000 ATK / 800 DEF

You can target 1 "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.

Rulings – Yugipedia

Printings:

Order of Chaos: ORCS-EN003 (Secret Rare) - 2012-01-20
Abyss Rising: Special Edition: ABYR-ENSE1 (Super Rare) - 2012-12-05
Super Starter: V for Victory: YS13-EN010 (Common) - 2013-06-14

Prices:

Cardmarket: 0.12 €
TCGplayer: $ 0.28