Chapter 491:

The only chance he had would be to weaken it through multiple strikes, slowly wiping away the concentric circles on its body. Thus, using the creature’s own energy to destroy it was the most effective method.

Using "the enemy’s energy" to kill the enemy would always be more efficient than using "external energy."

Because the power of the Soul Suppression attack was drawn from the enemy forces themselves, it shared an inherent connection with them, causing less disruption and sensitivity. Thus, the two commands Memphis had issued earlier would be executed precisely.

"Who would suspect that their own attack dog would suddenly turn around and bite the