Morgan le Fay
Morgan le Fay is a powerful sorceress in the Arthurian legend. She was King Arthur’s half-sister and enemy. Morgan le Fay is said to have been quite powerful, she hated King Arthur even as he was her half-brother (She is also said to have wiped out most of the Templar Knights). She is as well one of the main antagonist's of the Grey Griffins book series.