Honestly, I don't think it has anything to do with Knull at all. This is simply a resource commmonly used when supernatural, demonic entities (or posessed people) speak. You could probably find thousands of examples in comics, with guys like Mephisto, Dormmamu, Cthon and similar (and the posessed) talking like that. knull borrowed that kind of speech from ones who came waaay before him too.
That would be awesome, Vordan!
After all, TOBA does want to turn into a hollow shell, an empty machine of destruction, a "Hulk". That gives an idea of how powerful that guy from above can be (as I've said in another place, I'm not even talking about WBH), and why an entity would like to pilot that.