That was my point. The death of millions, consecrated in the Name of The Dark One is what gave him the soul-power needed to ascend. Xykon just has do his own massacres to fuel his own Divine Ascension if that's what he's going for. And it would be less praying to him as loyal followers, and more praying to him not to super-murder them now that he's a God. Kind of like what Hel got on the previous worlds.