"Ghost. That's what my underling communicated to me just before I lost my spiritual connection with him."
A spiritual connection between two spirits can only be cut if one dies. Everyone considered him dead in their hearts but didn't mention it. They didn't want to tell their father that his son had died as it was something he didn't want to hear and would only work to sadden him further. Being his underling meant being its son. The world of the spirits was different than humans.
"Father, do you mean a powerful ghost is haunting this corridor?" The rank-2 spirits looked at their father in shock.
The rank-3 gave them a nod and spoke.
"Yes. It must have snuck here from the Ashen lands. It has disobeyed the command of our God. So, it is but a heathen. Fear it not. Harden your heart, grab your weapons and seek it out. We must eradicate it."
"Avenge our fallen comrades!"