Legends say that deep under the Undead swamps there exists a supernatural void; an unholy abyss absent of all light, in which unfathomable creatures skitter about in the inky dark. Among them are the Nox.

The Nox wear darkness like a cloak, dragging night into day in vast clouds that defy all reason, enveloping entire empires in an alien twilight wherever they strike. When the daylight returns, there's not a trace of their enemies left.