The Dark Eye existed within Shadow Space and was generally difficult to detect unless someone possessed specialized methods for investigating Shadow Space.
Such methods of investigation, relying on Shadow Space, were indeed difficult to guard against.
For instance, Duke had no way of knowing whether something like a Dark Eye was watching him nearby.
Thinking of this, Duke purchased another Dark-Attribute Spell: Shadow Perception.
Shadow Perception could enhance a Wizard's ability to perceive Shadow Space. If something existed in the surrounding Shadow Space, there was a certain chance of detecting it.
Shadow Space was a special space within the Infinite Planes. On some planes, it was also called Subspace, the Inner World, and so on. It was said that the spatial-jump technology of Space Fortresses and Space Airships was achieved with the aid of Shadow Space.
Under normal circumstances, lifeforms within Shadow Space could not directly affect real space. At most, they could observe from the shadows like the Dark Eye.
However, actively entering Shadow Space was different and carried certain risks.
This was also why Duke did not often use Shadow Cloak, saving it only for critical moments.
Duke had spent more than eight hundred contribution points to exchange for these two Dark-Attribute Spells, leaving him with just over two thousand contribution points.
After obtaining the two spells, he began researching and studying them.
This was how a Wizard's spellcasting system worked. Mastering every spell required a great deal of time and effort. Only after thoroughly understanding a spell could one truly master it.
It was unlike the spellcasting system of the Oracle Plane, which was so fast and convenient. One only needed to master an incantation, and with sufficient mental power, could cast a spell.
Duke discovered that both Dark-Attribute Spells placed extremely high demands on talent.
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