He repopulated Hyperborea after humans deserted the city of Commoriom. Athammaus tried to execute him by beheading, but because of his preternatural heritage, such attempts proved unsuccessful and only served to aggravate him. As a descendant of Cxaxukluth, Knygathin Zhaum reproduced by fission and thus created an Azathothian strain among the Hyperborean Voormi.