REDU format ruling
Raregold Armor

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)As long as you control the monster equipped with this card, your opponent cannot attack other monsters other than the equipped monster.
Rulings
- Raregold Armor & Metalsilver Armor only apply their effects when the same player controls the Equip Spell Card and the monster it is equipped to; you can equip these cards to a monster controlled by your opponent but the effect is not active.
- If you have 2 monsters equipped with Raregold Armor, then your opponent cannot attack.
- If you have a Warrior-Type monster equipped with Raregold Armor, and Marauding Captain, your opponent cannot attack.
- You have an Amazoness equipped with Raregold Armor, and Amazoness Tiger, your opponent cannot attack.
- Ring of Magnetism 'trumps' Raregold Armor, Amazoness Tiger, and Marauding Captain. So if you have a monster equipped with Ring of Magnetism, and a monster equipped with Raregold Armor, the monster equipped with Ring of Magnetism is the target of attacks.
- If you control Patrician of Darkness and have a monster equipped with Raregold Armor, you can only re-direct attacks to the monster equipped with Raregold Armor as it is the only legal target.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.