Puritan's Bracers (3.5e Equipment)
From D&D Wiki
The Puritan's Bracers were created by a long dead king. His lands were beginning to develop magic users in the form of sorcerers, his court had always had a wizard or two but now the country sides were filled with roaming spell flingers, both as bandits and adventurers. The king however hated things he couldn't control, magic being chief most in his mind, so when the outbreak of magic began he had his loyal court wizards craft these as a punishment. Sorcerers who were caught were put into the army with a pair of these bracers and were to serve until they died or became loyal.
The Puritan's Bracers add a +2 STR and +2 CON enhancement bonus, they however cut all access to arcane magic in any form, simply dispeling the magic wont free up access, only a Mage's Disjunction or similar level spell can sever the bracers effect