Ring of Magnetism

Equip Spell

You can only equip this card to a monster on your side of the field. Decrease the ATK and DEF of a monster equipped with this card by 500 points. In addition, all the monsters on your opponent's side of the field can only attack the monster equipped with this card, if they attack.

Rulings – Yugipedia

Printings:

Metal Raiders: MRD-139 (Common) - 2002-06-26
Metal Raiders: MRD-E139 (Common) - 2002-06-26
Metal Raiders: MRD-EN139 (Common) - 2002-06-26
Starter Deck: Pegasus: SDP-039 (Common) - 2003-03-30
Dark Beginning 2: DB2-EN082 (Rare) - 2005-07-27

Prices:

Cardmarket: 0.02 €
TCGplayer: $ 0.13