Li Yan discovered that the black energy that formed the Black Giant Dragon was actually a type of exclusive Magic Power.
The ancient spells that nurtured exclusive Magic Power were so old that their very existence was legendary.
Had Li Yan not read all the books, encountering some in ancient magic tomes, he probably wouldn't have realized that black energy was essentially a type of exclusive Magic Power.
In this world's Magic System, if one were to put it bluntly, magic is a "program," and Magic Power is the necessary "fuel" to run the "program."
Generally speaking, when magic collides with magic, while bursting forth with tremendous power, it also consumes Magic Power, this "fuel."
But the "fuel" that had been expended could not be used again shortly after, needing some time to recharge.
Logically, exclusive Magic Power should be the same.
