Nehjarra was an ancient spirit of lies. It predated the colonizing of Chicago and was set in place by the Circle of Four. In this role, it helped cause the fall of numerous societies in the area and with pacifying the Antediluvian.
At some point it taught the Dark Man the secret of immortality, but he left Nehjarra to pursue his own goals.
Still bound to a plot of land in Gary, it sought to escape. It corrupted the mages who now make up the Disciples of Nehjarra. With their aid, it birthed several cursed children in hopes of creating a vessel for itself. It plans were thwarted however and it was dispersed by the Iron Hand.
It retreated to the Wending of the Circle of Four. But the Ebon Cross, the White Lady and the Dark Man destroyed it.