Aftershocks.

The white Ghoul won't obey the fountain of life since the will of the plane and it are not in sync or harmony. But it won't attack the fountain of life anymore either. To do so is to harm the will of the plane. So it left to hunt other targets. 

The fountain of life expected it to give after acquiring 50% of the Will of the plane. Unlike Rnioz, it doesn't gain any boost from the title. This is so despite the fact that it is helping the Will of the plane to stabilize Itself and fight against the demon god. 

So in a way, the fountain of life is doing the Will of the plane a favor. But in exchange, if the fountain of life dies, then 50% of the Will of the plane will die too. The plane will surely fall to the Will of the demon god then. 

"Now where is that troublesome Ragnarok?" It said to itself. "He has been useful so far against the demon god. But it is now time to put an end to him."