The Death Bringer is a prophesied Necromancer that will be strong enough to break down the wall between life and death, in a process known as the Passage. The Death Bringer would have to kill around 3 billion people in order to stop the rest of the world from dying. Before the events of the series, the Necromancers believed that Lord Vile was the Death Bringer. However, after he joined Mevolent, the Necromancers began their search for a new one. Solomon Wreath believed that Valkyrie Cain was the Death Bringer, while Vandameer Craven thought that that Melancholia St Clair was the one.
In Death Bringer, Craven presents Melancholia to the Necromancers, having carved markings into her skin to loop her Surge, and she is proclaimed to be the new Death Bringer. However, at the end of the book, Melancholia fails at completing the Passage, so Melancholia is not the Death Bringer.
It is said that the Death Bringer could be an equal match in a battle against a Faceless One.