Telogorx

The Nightmare Engine, - Mining automata below the undercity broke into the time-lost chambers of an slumbering remnant of the Occulted Age, infesting and corrupting them, fusing them into an unholy bio-technological abomination, slowly incorporating more automata, growing more powerful and sapient through the incorporation of more units.   Side effect of the corruption is the introduction of sapience to regular automata, those who come in contact with corrupted units have a chance to catch the infection where a small part of Teogorax is transferred to them.