Thanatar-class Siege Automata

The Thanatar Class Siege-Automata is a heavy class automata utilised by the Legio Cybernetica during the Great Crusade and Horus Heresy eras during the mid-30th and early 31st Millennia. Designed as a mobile artillery platform rather than a general battle unit, it is armed with a Hellex pattern Plasma Mortar, a terrifying weapon able to launch dense spheres of blazing plasma on arcing trajectories over defensive barriers and into the heart of enemy fortifications, incinerating anything in their blast radius with a liquid tide of sun-hot fire. The Thanatar's frame, built to accommodate the huge weapon and the power systems and fuel reserves required to supply it, is considerably larger than even the hulking Castellax-class Battle-Automata. Its frame is also heavily reinforced, both to withstand the stresses of firing its principal weapon and protect it from incoming attacks. This factor, alongside the use of an atomantic shielding array, make Thanatars notoriously durable. Such is their resilience that Thanatars are beyond the ability of most small arms, no matter how advanced, to harm. It is not known if this particular class of heavy-siege automata is still utilised by the mysterious Legio Cybernetica in the latter 41st Millennium.