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 was known to have been fairly powerful (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.