Oscar Drepson was once an influential (though sleezy) Nobleman of Blocktir. During an expedition, Drepson's company accidentally wandered near Vyldain's lair and were corrupted and slain. This provided Vyldain with a large amount of armor, organic matter, and iron.
Using sorcery and slag's corruptive properties, Vyldain turned Drepson and his company into a heavily armored horde possessing a half-living war machine powered by psychic energy. Though Drepson's company destroyed Odinshage, General Gatner was able to ignite an explosion that destroyed the entire company.