It did not take long for Zatiel to be back at the mountain range. There was no sign of exhaustion on his face, and anyone who saw him for the first time would think he was at his peak. He knew very well that showing weakness in Baator was equal to suicide and made sure to hide his actual condition.
The Neo-Demon saw hundreds of thousands of lesser devils devouring the corpses of the ones who have fallen. This beastly behavior may not seem fit for a cunning race like devils, but consuming their kind was the fastest way for these creatures to improve their cultivation and bloodline.
Those at Rank 4 also sought to improve their power that way, but they had more pressing matters. Using spells to change the terrain, they began constructing a massive citadel around the mountain range.
The Devil Counts also worked on this project. They inscribed hundreds of runic formations and magic matrices in the terrain and used a type of liquid metal to form the buildings.