Megaliths are enormous mobile fortresses used by the Necrons. Similar in appearance to the Monolith, Megaliths are far larger and can carry multiple Monoliths within its hull, releasing them like a swarm upon the battlefield. Beyond their awe-inspiring size and the ability to transport multiple Monoliths, the Megalith is equipped with an arsenal of devastating gauss and particle weaponry.
A Megalith was encountered in the hands of Overlord Zahndrekh of the Sautekh Dynasty during the Necron Conquest of Uttu Prime. There, it annihilated 3 regiments of Catachan Jungle Fighters of the Imperial Guard and a force of Imperial Fist Space Marines.