Ally of Justice Unlimiter

Level 2 DARK/Machine Effect
600 ATK / 200 DEF

You can Tribute this card to select 1 face-up "Ally of Justice" monster you control. Double its original ATK until the End Phase.

Rulings – Yugipedia

Printings:

Duel Terminal 2: DT02-EN081 (Duel Terminal Normal Parallel Rare) - 2010-05-25
Hidden Arsenal 2: HA02-EN051 (Super Rare) - 2010-07-15
Hidden Arsenal: Chapter 1: HAC1-EN086 (Common) - 2022-02-24
Hidden Arsenal: Chapter 1: HAC1-EN086 (Duel Terminal Normal Parallel Rare) - 2022-02-24

Prices:

Cardmarket: 0.02 €
TCGplayer: $ 0.16