Phylactery

From WoWWiki

A phylactery is a container.

Lich phylactery

A lich phylactery contains a Lich's soul. As long as a Lich's phylactery remains intact and undamaged, the Lich will eventually regenerate its body and return to life.

Phylactery of Faithfulness

The Phylactery of Faithfulness is a small box containing religious scripture affixed to a leather cord and tied around the forehead. Commonly used by night elves and members of the Silver Hand, use of this item has started to spread through the Horde faithful. The wearer is aware of any action that would adversely affect her alignment and her standing with her faith, including magical effects. This helps her solve ethical problems, allowing her to gain information prior to taking the action or associating herself with the item if she takes a moment to contemplate the act.^{MM&M 145}