He didn't want to kill Mu You out of any malicious intentions, but rather to sever Mu You's current state by having him resurrect through death.
Not to mention that the Holy Spear had already been mostly pulled out from Gusha's body, leaving only a minuscule part still acting as a suppressant. Although the process of extracting the spear had automatically stopped after Mu You turned to stone, no one could guarantee that Gusha wouldn't attempt something to break free during this opportunity.
The Watchman and Ling Long understood what the Medicinal Plant Gatherer meant and did not dare to be careless, quickly cooperating with him to begin the attack.
All three were only level ten, Mu You had a significant level suppression over them, and after acquiring a real life, Mu You's HP had skyrocketed, making it not so easy to take him down.
After struggling for over ten minutes, the three finally managed to deplete Mu You's HP completely.
