In addition, a large amount of Secret Soul energy was also exchanged.
A total of one thousand units!
To earn this much Secret Soul Energy by completing a mission with minimal effort, points towards the value of each mission from the World of Calamities. As the main force exploring the Undead Cemetery, Casio received six hundred units of Secret Soul energy, while each Ghost Iron Knight received two hundred units.
Though Secret Soul energy was of use to them, it wasn't considered precious. Among the mission rewards, the most coveted thing was the authority increase, without a doubt.
The Ghost Iron Knights had stolen the crystal from the Dreadnought City Master and submitted it to the mansion. The authority increase they'd received that time had given the Ghost Iron Knights tremendous benefits, these upgrades covered every area. More missions, more exchangeable items, extension of the mansion's services, access to the mansion's secret areas… and so much more.
