After Linjos delivered both the magically sealed dimensional box and the coded letter, Lith felt like a burden had been lifted from his chest. It was the biggest, yet just one among many.

Now he had to prepare for the next dimensional magic exercise, research the runes sealing the boxes hidden inside his pocket dimension with the library’s help, study their pseudo core with Invigoration, and find the time to use Accumulation to keep refining his core.

Now that he had finally overcame the bottleneck, he could use his first breathing technique again, to amass the world energy and strive for the blue mana core.

Worst case scenario, it would make him as powerful as the Headmaster or a Professor. Lith had not missed how the more he refined his core, the more dramatic changes he experienced.

At the beginning, Lith had thought that by absorbing the world energy, he was simply overcoming his natural lack of magical force. But over time, by expelling the impurities accumulated in his blood, organs and now in his bones, things had become unsettling even for him.

So many things didn’t add up. At the White Griffon academy, there were plenty of students with a mana core stronger than his own, even his teammates. Yet none of them exhibited a physical prowess like the one Lith now possessed.

Hence, it wasn’t just a matter of the mana core. As for the impurities, it couldn’t be as simple as that. In the past he had removed them with Invigoration from his parents and sisters, but again, no such thing had happened.