"You're a bit stronger than I imagined. I thought you were just a foolish young master from a wealthy family, but it turns out you have some backbone."
Seeing Yisen Gard catch up to him, Ian sincerely commented, "Don't feel too guilty. This parasite is very unusual; I even suspect it might be a type of Spirit Energy creature—otherwise, how could it take over the human body so quickly... It's less like taking over the nerves and more like some kind of Phantom possession."
Spirit Energy creatures do exist on the Terra Continent, although they are rare but not mysterious.
Just like the Fae and Phantoms, they are special Spirit Energy creatures—there's no need to elaborate on the Fae. When a person with Spirit Energy talent dies amidst intense emotional turmoil that could awaken them, they might disturb the surrounding Spirit Energy Field and become a Phantom lingering in a specific area, wandering in special places.