Because when Xiang Shan delivered his final strike, Daijiu Tai'a had already plunged deep into contemplation, even unable to restrain his emotions, so he did not notice anything wrong with the way Xiang Shan used his sword.
If he had remained calm, then the loud crash produced by the collision between the Sonicon Blade and Appennine's Prosthetic Body would have made him feel "ruinous."
The Sonicon Blade did not need to be used in this way. A gentle tap could disrupt the crystal structure and slice through the armor.
When Xiang Shan cut down like this, it meant that after breaking through the armor, he continued to slice through a whole bunch of "non-crystalline" materials including wires, silicone, and biological tissues.
It wasn't that he couldn't cut through them. After all, the blade of the Sonicon Blade was also a "sharpened hard crystal."
However, this itself would cause wear and tear on the blade of the Sonicon Blade, greatly reducing the weapon's lifespan.
