Hellfire Engines

These semi-autonomous bringers of destruction can turn the tide of any battle in mere moments. On the bloody tundra that is Glacia, the first Hell, scores of demon hordes meet their end to hellfire engines, either crushed beneath them or rent to waste by the magics these constructs send forth.
These creations are one of the most valuable military assets of the Hells, and their need for hellfire fuel is the chief reason a whole layer of the Hells - Pyren, the fifth Hell - is devoted to hellfire's production. 
Hellfire engines come in many forms - roaring carriages the size of buildings, mighty galleons that spew death from the waters of the Styx, giant golems with destruction as their only goal. Regardless of form, hellfire engines all have one thing in common: they force the souls of mortal creatures slain by them to join the infernal legions. Without the intervention of powerful magic users, such souls will join the ranks mere hours after their body's death. The powers of the Hells would love nothing more than to modify this magic so it worked on those souls now malformed into demons, but such a discovery has eluded them so far. 
Category:Constructs and Oozes