Advanced format ruling
Ring of Magnetism
Card effect (current official text)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.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.