Eye Ring (3.5e Equipment)
From D&D Wiki
Eye Ring: A ring with an eye embedded in it. The eye appears to constantly be searching, searching every nook and cranny for some unknown object. With the ring equipped, a user can transform holy items into unholy ones.
Strong transmutation;CL 15; Craft Magical Item; Cost 15,000 gp, 8,000 EXP; Weight: 2 lb lb.; Market Price: 25,000 gp