Ok, my question for CodyJarret....
Who does Karadoc the Dwarf have to face at the end of Cadaver?
(probably not hard enough that one)
Cody's answer below is correct. DIANOS is the last (main) enemy to be defeated.
Incidentally, I almost registered on EAB as DIANOS but I had been mistaken as a female with that name at other places so decided against it and stuck with Dast.