Nidus

Very little is known about this entity. He lives in the Abyss, but claims not to be a demon, merely one who studies them. His works date back a long time and have significant power, including a set of obelisks that, when activated, modify the flow of time in a region 4 miles across.

Almost everything he builds involves necrite, and the few records that mention him either claim that he's an "friendly obsidian dwarf" or a "colossal apocalypse clad in obsidian."