Void energy was among the most difficult elements to harness, demanding not only patience due to its incredibly slow process but also great resolve, given the intense pain experienced during its initial entry into one's body.
This was particularly true for mages, who, like priests and priestesses, generally had the weakest physiques among adventurers.
Worse, if one wanted to advance his/her studies in Void Magic, one would have to practice harnessing the powers of higher-quality void energies which could only be found in expert adventurer zones and death zones.
This was true even for warriors, scouts, and archers if they wanted to increase the power and level of their void-type skills.
Merely using them repeatedly like other elements wasn't enough.
This was why the two were mesmerized as countless purple magic circles surrounded the Black Dragon in a dome-like shape, momentarily confusing the deity.