Brain Jacker

Level 2 DARK/Fiend Flip Effect
200 ATK / 900 DEF

FLIP: Equip this card to a monster on your opponent's side of the field and treat it as an Equip Card. Take control of the equipped monster. Your opponent gains 500 Life Points during each of their Standby Phases.

Rulings – Yugipedia

Printings:

Flaming Eternity: FET-EN034 (Rare) - 2005-03-01
Flaming Eternity: FET-EN034 (Ultimate Rare) - 2005-03-01
Dark Revelation Volume 3: DR3-EN154 (Rare) - 2006-11-25

Prices:

Cardmarket: 0.62 €
TCGplayer: $ 0.59