Agatha Harkness is a fictional character that appears
in American comic books by Marvel Comics. She is a powerful witch, who is a
friend and teacher of Wanda Maximoff and the mother of Nicholas Scratch. She
happens to be one of the original witches from the Salem witch trials and
becomes a significant character in the Marvel universe. 

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Harkness derives her powers from the manipulation of
the forces of magic. She also has the ability to mesmerize, cast illusions and
cast thoughts. 

Harkness does not generally engage in direct magical
combat due to the physical limitations of her advanced age. The sources of her
magic include natural forces, extra-dimensional beings, and her own innate
energies. Her spell requires a number of mystical components including but not
limited to charmed circles, arcane chants, and the use of enchanted items. 

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Harkness has mastered dark magic powers after years of
study. After obtaining Darkhold, she used it to amplify her powers which enhanced
her spells. She has survived for at least three hundred and twenty-five years
after absorbing the magic of the witches of her coven. Harkness magic allows
her to interact and control the mind of others. She was able to make Herb, her
neighbour and go along with her plan in a confusing vision. She was able to
project images of her exploits within Westview into Maximoff’s mind. Also, when
she was inside an illusionary recreation of Maximoff’s memories, she was able
to cause Maximoff to directly relive the experiences as well as pull her out of
them. 

Harkness was also able to change her appearance and costume for that of a normal neighbour. She also changed a cicada into a bird and back. Harkness could project powerful bolts and blasts of purple mystical energy from her hands. After absorbing the Chaos Magic from Maximoff’s energy bolts, she was able to fire projectiles made of Chaos Magic and her Dark Magic combined. She has a possibly demonic cat, Ebony. It can
regenerate from virtually complete destruction, transform into a panther or a
giant humanoid feline, and through Harkness can see, hear and occasionally cast
spells.

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Kathryn Hahn starred as Agatha Harkness in the Marvel Cinematic Universe miniseries ‘WandaVision’. She is all set to reprise her role in a spin-off series about the character, ‘Agatha: Coven of Chaos’ which will premier in late 2023 or early 2024.