Theoretical Test

So, why did you work so desperately to be able to learn this explosion skill?" said Angus.

Hearing this question, Ferry looks gloomy and immediately tells Angus about his life story. Apparently, Ferry is a commoner with a hard life. 

Before becoming a member of the explosion squad, he was an adventurer of a small guild. As a commoner, third grade is already the height he could reach. Beyond third grade, he needs to get guidance or support from others.

This kind of problem happens to a lot of combatants in Firuman. Unless they are already talented enough to break through grade four on their own, most of the combatants will be stuck in the third grade.

This is also the reason why education facilities like the royal academy are important. Just by managing to form a mana core using their standard technique already guarantees the student to reach at least fourth grade.