They had been together for so long that Ye You understood Qin Sisi well. She wouldn't take a life unless absolutely necessary.
In the battle to break the formation, the enemy's tens of thousands must be completely rendered incapable of resistance, allowing them to penetrate without hesitation, seize the moment before the opponent reacts to kill the operators of the other six formations, ensuring those six formations crumble on their own, enabling the forces of the Seven Major Families to continue advancing.
The formation they faced was the key to the battle of breaking the formation; they could only succeed, not fail, or else all prior efforts would be wasted.
"Sisi, leave this task to Teacher Yirou. After breaking the formation, help me kill the seven Earth Demons guarding it." Ye You spoke softly; for the few particularly vicious enemies, Qin Sisi would definitely not be merciful, he was sure of that.
Qin Sisi thought for a moment and nodded in agreement.