Xori: Threats from the Savage Dirge

From Introduction:

The most common foe to most any party is the Savage Xori Dirge.

Xori themselves were born in a heated war in the astraea of Sidir Xor between the undead and the living. The xori were created when a prominent living magical researcher fully unraveled the secrets to becoming a lich, discovering a half-state somewhere between living and lichdom. He and his rather large cadre of human apprentices became the undying race now known as the Xori.