However Chapter Master Calgar charged several strike forces with seeking out any allies or foes in the Vigilus System and Maltis joined a force led by Captain Acheran, as he sought the status of the Industrial World Nemendghast. When they arrived at the world, aboard the Strike Cruiser Carpatia, the strike force intercepted signals from Nemendghast's surface that informed them it had fallen to Heresy. However the smog covering the world's atmosphere, prevented the Strike force from determining the true extent of its fall and Acheran ordered an immediate deployment to Nemendghast's surface. What they discovered was a hellish world, whose factories that had been remade by the Black Legion to create Daemon Engines and Possessed Chaos Space Marines. Though they were vastly outnumbered, Acheran refused to leave and instead ordered an attack to destroy the Daemon factories. Maltis' Psychic powers greatly aided the Strike Force and their attack would have immedialty failed were it not for his aid. Even still though, the Strike Force took heavy losses with each Daemon factory destroyed, until only a small fraction remained, as they began attacking the Black Legion's main factory known as the Forge Infernus. It was at that time though, that the crew of the Carpatia contacted Acheran and informed him that a large Chaos fleet was coming to Nemendghast's aid. With their time running out, the Captain led the strike force in an attack that destroyed the Forge Infernus, but they then became swarmed by the Black Legion. Acheran knew they could not break free from the Traitors and instead ordered Maltis, to escape to Vigilus and bring word of what had happened to Chapter Master Calgar. Maltis then used his Psychic powers to blind the Black Legion to his presence and successfully returned to the Carpatia, which then escaped to Vigilus.