Dark magic.
It originated with the ancient demon god Sithos, himself one of Earth's earliest life forms, born in roughly the same era as Osh-Teg, one of the Vishanti, from whom white magic originated.
The power he possessed was unimaginably vast and formidable, so much so that many demons had once borrowed, or still often borrowed, his power—Mephisto and Dormammu among them.
Naturally, he was also the first dark magician, known as the God of Dark Magic.
The Darkhold was one of his outstanding creations.
Meanwhile, the Book of Vishanti of the white magic faction was also called the Book of White Magic. It came into being long after the Darkhold, and it could be said that its birth was meant to oppose the Darkhold.
The use of magic always required a certain price.
However, the price of white magic was clearly stated, and using white magic did not leave aftereffects due to the power itself.
Dark magic was different. For creatures outside the magical factions, the workings of dark magic and every consequence brought by its energy attributes were unknown. These effects often caused users to commit terrible mistakes they would bitterly regret, and could even directly alter their personalities, with the influence penetrating deep into their souls.
Therefore, people's extreme wariness toward dark magic was understandable.
But Sithos did not care about such things at all.
The power of dark magic was plain for all to see. He alone was a complete origin.
White magic was not much weaker, but its origin was a trinity.
There was no definitive answer as to whether the Vishanti or Sithos was stronger, but from that perspective, it was hard to say that the Vishanti could certainly overwhelm Sithos.
Hong Fei naturally had no fear of being affected by dark magic.
So