Genex Ally Changer

Level 3 DARK/Machine Effect
1200 ATK / 1800 DEF

Once per turn, you can select 1 face-up monster on the field and declare 1 Attribute. The selected monster's Attribute becomes the declared Attribute until the End Phase.

Rulings – Yugipedia

Printings:

Duel Terminal 4: DT04-EN013 (Duel Terminal Normal Parallel Rare) - 2011-01-25
Hidden Arsenal 4: Trishula's Triumph: HA04-EN003 (Super Rare) - 2011-04-15

Prices:

Cardmarket: 0.17 €
TCGplayer: $ 0.23