The rest of the training went as per usual, with a few noticeable improvements every day. Durability saw the greatest improvement. Earlier this week, he could coat his ax head or a relatively large area of his ax instantaneously. It became close to second nature.
Thus, came the last part to gain manual control. To focus as much or less aura as possible in his entire weapon. It couldn't have been possible before because he needed more precise control over his skill. The two other exercises were just to familiarize himself with the usage of Durability.
To feel how his aura reacted to the skill. How much it cost him to use Durability. How it flowed through his body into the weapon. How it could be controlled so that only a certain area was coated.
With all this, he now had a better grasp of his skill.
BC: Bonus Chapter
Quick note: If you're wondering why some stats haven't reached Lv4, there is a reason to that.