The Helm of Awe is a powerful protective symbol used by the Vikings for the purpose of protection from illness, and disease. In Norse mythology it is said that it is a symbol that was worn between the eyes that induces fear in your enemies, and to protect against the abuse of power.
The raven is a common iconic figure in Norse mythology. The highest god Odin had two ravens named Huginn and Muninn ("thought" and "memory" respectively) who flew around the world bringing back tidings to their master. Therefore, one of Odin's many names was the "ravengod" (Hrafnaguð).
This pendant has a raven skull with the helm of awe symbol on the top, and it's supported by a black cord going through the eye sockets of the skull which can be adjusted for length.