The Exalted of the Void
Filial Eternity's Herald
The Right Hand of The Mask of Winters
Filial Eternity’s Herald is known to be an ancient and powerful ghost, albeit a more sane one than the Deathlords.
He is known to have served The Mask of Winters for the better part of recorded underworld history. Many speculate, however, that he predates even The Mask of Winters as a power of the Underworld.