He isn't too concerned about the threat of the fountain of life. It has not changed anything because he has always considered the fountain of life and the demon god to be threats to his life. It is because they are stronger than him. That wouldn't change even if he tried to please them. So he might as well do whatever he wants if he is going to die.
He asked playfully, "Are you really the fountain of life? I am shocked that you would threaten me for doing a good thing. You should be glad that I'm trying to get rid of the Vampires. Why are you antagonizing me? You should know that some good people will suffer in order for the evil people to be eradicated. It is just a small sacrifice to save the plane. Think of the greater good and help me instead."
The fountain of life didn't agree with him. It said one last thing. "Run and keep running."
Then it cut off the connection between them.
"That's just rude," Ragnarok said with a slight smile.