Forge Paellus is a massive fortified structure buried beneath the crumbling remains of an abandoned pre-Imperial city, and which now serves as the mechanical heart of Adeptus Mechanicus activity on Kalto. Beyond its colossal gates, the massive Skerab harvesters that trundle across the golden fields are born, and through these same gates the newest initiates of the cult of the Omnissiah disappear. There are also rumours of other, more unsavoury practices and research being carried out inside these towering walls. The increasing laxity of the ruling Magos and his attendants has only served to perpetuate such idle speculation. Many have also observed a decrease in their interactions with outsiders, as well as a disturbing trend of eliminating their external vox implants and biological speech organs through gruesome and crude surgical techniques.