Mors Gotha

Mors Gotha is basically Atarka's variant of the Avatar, but she is twisted and evil, full of deceit and fanatically loyal to the Guardian, her master. She is one of the main villains in Ultima Underworld II. She basically does the dirty work for him. She is feared and hated at the same time. While feared for her power, people also hate her, calling her the Guardian's "lap dog" and a "royal bitch" for example. She had only lost one duel in her whole life, and that was against Lobar (which still enrages her to no end).

The Avatar met her in the rooms of Killorn Keep in Ultima Underworld II, where she had taken over the command. She tried to lure him/her to her side, but when the Avatar refused, she and her guards attacked. Escaping with the Guardian's help before the Avatar could deal her a lethal strike, she lost her important Spellbook in the process. She was now all too eager for revenge.

She led the troops attacking Castle Britannia through the portal jewel, injuring Julia before confronting the Avatar to a second duel. Mortally wounded by the Avatar, she cried for the Guardian to help her, but he ignored her cries for help, and she died with hatred in her eyes.

Trivia

 * It's possible the Guardian was simply incapable of saving Mors Gotha when the Avatar killed her. Since the Blackrock Dome surrounding Castle Britannia negates magic, escape via moongate would have been impossible. But it's just as likely the Guardian abandoned her for her failure.