Drow House Insignia

These metal tokens are normally worn on a chain or in a pouch tied around the neck. Each bears a symbol of a noble house from a particular drow city and requires a secret command word to activate. An insignia has a single minor magical ability that can be used once per day, usually a 1st, 2nd, or 3rd-level spell. Those of powerful drow often have multiple abilities of various power levels. Typical spells for a house insignia are blur, cat's grace, cloak of dark power, comprehend languages, feather fall, jump, levitate, read magic, scatterspray, shield, spider climb, unseen servant, and water breathing.
Each insignia is slightly different, even those of the same noble house, so it is possible that a person aware of the unique shape of a person's insignia can magically locate that person.
CL 5th; Craft Wondrous Item, appropriate spell; Market Price: 360 gp (1st-level ability), 2,160 (2nd-level ability), or 5,400 (3rd-level ability); Weight 1 lb.
Source: Races of Faerûn