Number 25: Force Focus

Level 6 LIGHT/Machine Xyz Effect
2800 ATK / 2400 DEF

2 Level 6 monsters
Once per turn, during either player's turn: You can detach 1 Xyz Material from this card, then target 1 Level 5 or higher Effect Monster your opponent controls; negate the effects of that opponent's face-up monster, until the end of the turn.

Rulings – Yugipedia

Printings:

Galactic Overlord: GAOV-EN045 (Ultimate Rare) - 2012-05-08
Galactic Overlord: GAOV-EN045 (Ultra Rare) - 2012-05-08
Star Pack 2014: SP14-EN026 (Common) - 2014-02-21
Star Pack 2014: SP14-EN026 (Starfoil Rare) - 2014-02-21

Prices:

Cardmarket: 0.64 €
TCGplayer: $ 1.35