Number 94: Crystalzero

Level 5 WATER/Warrior Xyz Effect
2200 ATK / 1600 DEF

2 Level 5 WATER monsters
During either player's turn: You can detach 1 Xyz Material from this card, then target 1 face-up monster on the field; its ATK becomes half its current ATK until the end of your turn.

Rulings – Yugipedia

Printings:

Duelist Saga: DUSA-EN006 (Ultra Rare) - 2017-03-30

Prices:

Cardmarket: 0.35 €
TCGplayer: $ 0.39