At the core of any formidable Necrofactorium army lies its vast legions of thralls, along with the necrosurgeons who both create and lead them into combat. At the pinnacle of these necromechanical artificers stands the warcaster, Master Necrosurgeon Sepsira. 

Her authority is absolute, commanding her forces with an iron grip that even the dead cannot defy. Her army primarily consists of formidable Mechanithrall Swarms—mechanically enhanced, nearly unstoppable undead servants that fight in unison to dismantle and obliterate any opponent in their path.

Supporting these mechanized thralls are the Necrosurgeon Initiates, skilled in repairing and maintaining them, and the sorcerous Skarlock Lieutenants who serve as their direct overseers. Alongside Sepsira, the malevolent Machine Wraith Dominators wreak havoc on enemy warjacks and warbeasts, carving a path for thralls to break through the enemy vanguard.

Not to be overlooked is Grendel, a savage character warjack known to appear without warning.  Grendel often operates independently, bursting from a warren below the earth to strike at the enemy without mercy, and tear them apart with ruthless efficiency. Once it has ensnared its prey with its vicious claws, Grendel swiftly retreats, dragging its victim back to a grim fate.