Shadow Form Ring (3.5e Equipment)
From D&D Wiki
Shadow Form Ring: This black metal ring feels cold to the touch and the shadow cast by the ring flickers with movement
This ring allows you to fuse yourself with shadows that envelop you and follow with you. 2/Day you can cast Shadow Form which lasts for 3 minutes. Also, this ring attracts shadows to you slightly, you gain a +3 Hide bonus when in shadowy illumination.
Moderate (DC 20) Illusion;CL 9th; Forge Ring, Shadow Form (Spell Compendium); Cost 5,500gp, 440 XP, 11 Days; Activation: Standard (Command) and —; Weight: — lb.; Market Price: 11,000 gp