Every time a creature was killed by the red-haired man, a strange occurrence would happen near him. The occurrence in question was the complete disappearance of the creature's blood essence, without leaving any trace around it.
Normally when one died, the individual's blood essence would take some time to disappear and could still be sensed by individuals as the blood was still present in the person's body.
"Oh, that's quite interesting…", exclaimed Fell while paying attention to the red-haired man's next kill. It didn't take him long, and soon enough, the red-haired man took down another fierce beast.
As expected, he saw the creature disappear from his senses. Fell continued gazing at the man while pondering on the reason for such strange mysteries, and after a few minutes of patient analysis. He came to two very similar conclusions.