There were two things left in his entire agenda. The first one included figuring out the strength of his aura.
For that, he would need to learn aura techniques and be able to use them in battle. Without that, his aura would be useless. He only had a month and not all of that time could go to this.
He searched through his mind and quickly found what he was looking for. There were 5 techniques he could learn as a 3rd Circle Aura Knight. Compared to what he got from the Arcane Emperor, they were indeed a higher number of techniques for a single level.
But he understood why there were very few to learn. If he spent too much time learning multiple techniques, he would never master any of them completely and would also advance by then to the next level.
At that point, the techniques would become useless as he would need to devote more of his time to new and stronger techniques. The case in point was his case with the Obsidian Blades.