Nabasus are birthed directly into the Material Plane from the Abyss, where they feed on innocent souls to mature. Only when finally sated can a nabasu return to the Abyss. Rumor holds that even then the nabasu's lifecycle does not change, and that further developments await them as they continue to grow. These vile demons form from the souls of evil gluttons, particularly from cannibals, blood-drinkers, and those who prefer the tang of undead flesh.