Bab 1041: Source Of Blood Power.

Then the demon god stopped laughing. It spoke in a voice that was both hot and cold at the same time. "Let me warn you. You are either for me or you're against me. I will be waiting for you to change your mind. Till then, the entire force of vampires will come for you. If I can't have you, then no one will. If you won't help me, then you will go down with the plane. Either way, I will have the secrets that you hold dear."

Its voice made Ragnarok shiver while also scalding him like steam. It didn't make him cower though. He affirmed his will and did what he had to do. He didn't say anything anymore. All that needs to be said has been said. So he bent down and swallowed the skull whole. His divine ability got to work on the remnant of the primogenitor immediately.