Arthur was in the front yard, currently practicing his sword skills.
Back when he was a soldier without any blessings, with nothing to rely on but his sword, survival demanded that he develop his own techniques.
Through countless experiments and trials, he discovered a striking truth: there was a significant difference between a normal sword and one that vibrated. A glaring difference.
A vibrating sword could slice through objects with astonishing ease—so much so that even a novice could cleave a mountain rock with one slash.
Clarsen, who had studied the phenomenon closely, realized that even a slight but continuous vibration in the blade altered its cutting power dramatically. That realization led him to create a skill based entirely on the concept.
By augmenting his body through precise muscle control and focused energy output, Arthur could replicate the technique.