"As you can see, Mother Tiamat."
"My life has been seriously threatened, and I have no way to overcome this difference in strength."
"But I have not lost my will to fight!"
"For the continuation of the Red Dragon's bloodline! For your eminence to forever resound throughout the world!"
...
The Battle of Existence must not be abused. This was something that Max was very clear about.
After all, it was a secret technique from ancient times. At the same time, it was also the fastest way to become a god.
In order to prevent it from being abused, the gods were very cautious about its usage.
The pre-requisite for activating it was that one side needed to be in a fatal threat. Only then, would they be allowed to activate the Battle of Existence.
Otherwise, if they used it casually, they would be disapproved by the gods and they would be punished.