Lady Tartarus

From publisher blurb: The Hell You Say! Few villains are as devoted and persistent as the infamous Lady Tartarus. Her three children killed during a fight in NYC between the Sentinels and the monstrous forces of Hecate, Lady Tartarus beseeched Hades to grant her power to avenge. Hades transformed her into one of his undead minions; a magically-powerful lich! Since that day, Lady Tartarus has come back, again and again, to avenge herself upon the Sentinels. Super Powered Legends. Because sometimes what you need is a character everyone will recognize, even if they’ve never met her.