The Vaults of Moravec were a depository of forbidden knowledge and techno-arcana located on the Mechanicum's holy world of Mars in the Segmentum Solar. Hidden in a sealed vault inside a maze of old tunnels and chambers nearly a kilometre deep beneath Olympus Mons - the mighty forge of Fabricator-General Kelbor-Hal -- the Vaults of Moravec had been deliberately kept locked by the Emperor of Mankind who correctly judged the knowledge it contained as too dangerous to be known. When Warmaster Horus Lupercal began to plot his rebellion against his father, he promised Kelbor-Hal to lift the Emperor's ban on the forbidden knowledge stored there, thus swaying this powerful figure to serve him. The opening of the Vaults of Moravec would spark the civil war inside the Adeptus Mechanicus that would b