Kajabor is in the old books, he is 'the Void' who destroys all matter and spirit of beings he attacks. Supposedly the one who drives people to Wakboth; Kajabor's depiction is to hammer out a gaping ruin in anything. He is often conflated with Wakboth, though himself utterly impersonal.
One of my friends has that, actually. I think I'm going to read it.
One of my favorite ways to think about deities is to try and construct a biographical narrative (or one of the many possible), and something that occurs to me is 'was Wakboth ever a child, and if so, what was he like?' or, in the case of Kajabor, who - exactly - decided to find him? Or how did he find the gods?