ade available to the Legions only in limited quantities before the outbreak of the Horus Heresy, Leviathan Pattern Siege Dreadnoughts were highly valued and recognised as savagely powerful hunter-killer units. These constructs placed an onerous and ultimately lethal strain upon their occupants, with the Leviathan's incumbent burning brightly but briefly in their second life. Many in the Mechanicum were deeply uneasy over the design, but for a legion as murderous and torturous as the Night Lords, they were not only a terrifying tool to deploy against their enemies, but also grim tomb for