Genex Ally Chemistrer

Level 2 DARK/Machine Tuner Effect
200 ATK / 500 DEF

You can declare 1 Attribute and discard this card to select 1 face-up "Genex" monster you control. That monster becomes that Attribute. This effect can be activated during either player's turn.

Rulings – Yugipedia

Printings:

Duel Terminal 4: DT04-EN066 (Duel Terminal Normal Parallel Rare) - 2011-01-25
Hidden Arsenal 4: Trishula's Triumph: HA04-EN036 (Super Rare) - 2011-04-15

Prices:

Cardmarket: 0.10 €
TCGplayer: $ 0.13