The Helm of The Draesca
The Helm of The Draesca is a powerful and unique magical artefact. 
During each tribal coronation, the new High King of the Draesca tribe will don the Helm of the Draesca: an ancient artefact that accelerates the ageing process of its wearer dramatically but also grants them great power over the living and the dead alike.
Seven years of twilight are granted to the King before he finally succumbs to undeath altogether but during that time, his every whim is catered for.
Each new High King is determined to carve his mark on the world before his tenure has passed, and so the armies of the Draescan Kings go forth into the world every seven-year cycle, their numbers bolstered not only by thousands of the living dead but by the dusty cadavers of every king to have ever worn the helm.