For taking magic users into custody.
Mage-Cuffs Level 1 Common
Price: 360 gp
Property: When a person wearing mage-cuffs uses any magical power (generally defined as an arcane, divine, primal, psionic, or shadow power, or equivalent non-typed abilities), the cuffs glow, make a warning whistle sound, and deal 10 damage to the wearer. A creature reduced to 0 hit points this way is knocked unconscious, not killed.