Kain first noticed the abnormality, but he still couldn't react in time.
Cecilia's four teammates running towards her were the first victims.
Before, even though Cecilia used all her strength to attack them, they were still able to withstand her attacks for a while, this proved that they were not weak.
But at this moment, all four of them... were instantly defeated.
Kain could vaguely observe that the necks of all four of them had blurred in the blink of an eye.
This wasn't a lighting trick or anything, but Cecilia's blade distorted the light, and the distorted location was the targets' necks.
This is the difference.
Cecilia, no matter how angry or indifferent she was before, when she attacked, Kain noticed she always chose to attack parts like the chest, legs, or arms.
This is not necessarily an active choice, but a subconscious one.