The Eye of Darkness exists within the Shadow Space, and it is generally difficult to detect unless the other party has specialized means to explore the Shadow Space.
This kind of investigation relying on the Shadow Space is indeed quite hard to guard against.
For instance, right now Duke cannot determine if there is an Eye of Darkness-like existence watching him.
Thinking of this, Duke purchased another Dark Attribute Magic spell, which is Shadow Perception.
Shadow Perception can enhance a wizard's perception ability of the Shadow Space. If something exists within the surrounding Shadow Space, there is a certain probability of sensing it.
The Shadow Space is a special space within the Endless Plane, also referred to as Subspace or Inner World in some planes. It is said that the spatial jumping technology of Space Fortresses and Space Airships is accomplished with the help of the Shadow Space.
