King Arthur (Another 100 Shades of Dark)

One version of King Arthur (from a reality different from the King Arthur of Gothic Earth) had dark motivations in his heart when he sipped from the Holy Grail and was granted immortality but in the form of undeath as a death knight. Employing the aid of Morgan LeFay, he transformed other members of the Knights of the Round Table into graveknights, leaving only a few Knights led ironically by Sir Mordred to oppose King Arthur and his undead knights.