Water or Blood
Fall of House Grey
A half Eater Warlord claiming decent from the Grey’s by way of their wayward Daughter came to Hardmarch with a horde and promised the family riches and glory. Defeating the protective magic that could not harm a Grey the Warlord took Hardmarch, slaughtering and eating those who would not join his army. In his new fortress this warlord raided from Geth to Aru.
This warranted a full imperial response and five legions convened on Hardmarch, and with great assistance from angered Librarians they shook the earth sinking Hardmarch and all its occupants into solid stone never to be seen again. The legions then took to the mountains hunting eater clans, but tragedy struck and three of the five legions ended up eaten and destroyed with the other retreating to the civilized frontier.