Actually, completing the task of [Mr. Swaphead] was not much different from what Yan Junze expected.
First of all, the level of the task was "Terrified (Medium)," which meant Corante's strangeness level would not exceed that of an Ethereal spirit, at most it would be a Semi-Ethereal Spirit.
But as it seemed from just now, Corante didn't even reach the level of a Semi-Ethereal Spirit, he was probably just a high-level Sculpting Spirit.
It was just that this guy must have had some special means, such as the use of items like his cane and top hat, which could rapidly increase his attacking power or cause a burst of power in short periods, which is why he was able to kill so many exorcists in succession.
The method to break this kind of strangeness was actually quite simple. Through the mission information, Yan Junze had already roughly understood Corante's background, and then by combining it with a search online, he could probably figure out Corante's true cause of death.