Besides the Black Serpent Breathing Technique, his Forging and Golden Cross Slash significantly improved. However, he was still some time away from a breakthrough.
In short, Levi believed he would become a mid-level knight before the end of the year. By then, his strength would have a significant leap.
After cultivating his breathing techniques, Levi took out the Man-Faced Spider Breathing Technique.
Levi had never cultivated it ever since he obtained the technique.
Now that the Siren Breathing Technique was at level four, the Special Effect, Shrink Bone Transformation, was also activated. Overall, he achieved the goal of cultivating the Siren Breathing Technique. The next step was slowly reaching the fifth rank and upgrading the Special Effect, Beginner Speed, to Intermediate Speed.
Now, Levi had the time to learn a new breathing technique.