After the third test group finished drawing in fel energy, some time passed before the rangers of the first group finished refining and absorbing their previous intake. Another round of absorption tests then began.
Since the test subjects needed time to refine the fel energy they absorbed, only two rounds of tests were conducted that day. A total of six Infernals were summoned before they wrapped up.
The rangers would not see any obvious improvement in strength after absorbing fel energy just once or twice. Back when Yu Lin Bloodhawk absorbed the Aspect of the Blue's source power, it had taken him several months, yet he had only advanced from a Mid-Rank Ranger to a High Ranger by the time he emerged from the secret chamber. During that period, he had repeatedly used the immense source energy of the Aspect of the Blue to forcibly tear open and stretch his internal "mana pool," expanding his mana capacity. That was the most painful and time-consuming part.
In fact, Yu Lin Bloodhawk thought this so-called "mana pool" would be better called a sea of qi. To him, the expansion process resembled the enlargement of a martial arts master's sea of qi when breaking through to a new realm. The very word "breakthrough" conveyed how difficult the process was.
Although ample energy could nurture practitioners through the ranks below high rank, that did not mean everyone could truly become a High Ranger. The key was whether they possessed the resolve and perseverance to willingly endure the painful process of tearing apart and rebuilding their sea of qi, again and again. It was like modern students: they all used the same textbooks and received the same education, but not every student achieved the same results. Aside from talent, wasn't personal effort also an important