Imperator Titan

The Imperator Titan is the mightiest war-engine ever set walking by the Adeptus Mechanicus, an Emperor-class god-machine so vast that a fortified cathedral rises from its shoulders and battlements crown its hull. Where lesser Titans are weapons, the Imperator is a mobile fortress-temple, carrying batteries of macro-cannons, plasma annihilators and a hellstorm cannon capable of scouring an entire battle-line from existence in a single volley. Regiments of Skitarii and tech-priests dwell within its armoured bulk, tending reactors and shrines through campaigns that last for years. Ringed in layered void shields and clad in adamantium thick as hab-block walls, it can wade through the fire of massed artillery unscathed. When an Imperator marches to war, whole crusades are built around its advance, for its coming heralds the wrath of the Machine God made manifest, and no fortress of the enemy is reckoned safe before it.