As a little lore and realization: Zeraki's ancestor had been the one to warp and break Dvesel's ancestor resulting in the Plague Monger. The soul purpose of the Plague Monger was to spread disease and pain though inevitably kill her lover turned captor. In the end Zeraki has fulfilled that ages old goal.
He's both a cause and cure of Daywalkers. I like how it all came full circle without much thought.











