An oceanic hive world where drowned continents leave only archipelagos and half-submerged spires, Lo is both an industrial powerhouse and a decaying ruin. Tens of billions crowd into vertical hive strata: nobles in the upper towers, laborers in manufactoria barracks, and gangs, mutants, and Kasballica syndicate agents in the flooded underhives.
Lo’s manufactoria, led by the Loi Metalworks Armoury, churn out weapons, vehicles, and munitions vital to Calixis Crusades. Hydrothermal domes harvest volcanic energy, while billions of conscripts feed the Guard.
Ignis Aeternus WH 40K campaign notes 