Realizing that the situation was turning unfavorable, the Mystery Saint quickly responded.
He first used a powerful Mystery sealing spell to temporarily repel Nald's attack.
Then, the Mystery Saint began to negotiate with John. In the Mystery Saint's view, he might still have the credentials to collaborate with John.
"Do you really intend to battle me to the end? Haven't you figured out who poses the greatest threat to you? With the Book of the Astral Realm, Nald could completely annihilate your Order Faction. Although I possess great power, I haven't yet successfully revived. I believe we can cooperate, after all, Nald is our common enemy."
Faced with the Mystery Saint's persuasion, John did not express opposition, nor did he agree outright.
John was also weighing the pros and cons.
He could certainly discern who his greatest enemy was at the moment.