The Masters of the Mystic Arts are an order of sorcerers who are committed to protecting the Earth from mystical threats.
The Masters of the Mystic Arts were first founded in Earth's ancient history by Agamotto. Following his discovery of other dimensions, Agamotto found ways to draw power from these alternate universes to create magic spells. However, realizing that these new dimensions also introduced the possibility of the world being threatened by extradimensional threats, Agamotto formed the Masters of the Mystic Arts as a league of magic practitioners, dedicated to learning magic so to safeguard the Earth from dimensional evils.
The threats they train to face include dark sorcerers, ghosts, demons, and dark gods that would enter their universe with malicious intent. The greatest multidimensional force to ever threaten Earth was Dormammu, ruler of the Dark Dimension, who sought to absorb the Earth Plane into his own.
To aid in their mission, the Masters created three sanctums in New York City, Hong Kong, and London which generated a ward that kept Dormammu from passing through to the Earth Plane.