The Licenian Heresy
“If it does not rot, if it can lie like this here forever… is it truly dead?”
The Yu’vath were a blight in the era of Lord-Militant Angevin, prior to the creation of the Ixaniad sector in the fourth century of the 39th millenium. The warp-worshiping Yu’vath enslaved worlds through vile xenos sorcery, expending the lives and souls of corrupted human slaves to build such horrors throughout the Calyx expanse that chroniclers of the Angevin Crusade forebore to record them. The warp-ridden Yu’vath and their tormented slave armies bled the Crusade’s forces for decades before their ultimate extinction at the hands of General (later Saint) Drusus and the Adeptus Astartes. Even now, chronicles of the Angevin Crusade’s victories over the Yu’vath are restricted works, and few savants know what came before the blessed establishment of the three sectors of the Calyx expanse.