Height: Variable. The Magus' height has ranged from 6 feet to .5 astronomical units (45 million miles).
Weight: Variable
Eyes: Black
Hair: In his true form the Magus has no hair although portions of his head resemble hair.Strength level: At full power the Magus possesses enough strength to rend an entire star in two and hurl part of it through space.
Known superhuman powers: The Magus is a form of "techno-organic" life, meaning the organic substance of his body is similar to metal (as that of Colossus in his armored form is, though in a different way), and his bodily structure resembles machinery in various ways (for example, organic "circuitry-tike" structures can be seen on the surface of his body).
Like his son Warlock, the Magus can change his shape into that of virtually any solid living being or machine. When he takes the form of an Earth living being, he does not look at ail like a machine, but looks exactly as that living being does. When the Magus takes the form of a machine, he retains his intelligence. He uses his own life energies to empower himself when in machine form. (Hence, if the Magus took the form of a helicopter, his own energies would cause it to fly, not gasoline.) The Magus can draw molecules from an unknown, possibly extra-dimensional source to add to his own mass.
The Magus can replenish his life energies by transforming living creatures into techno-organic beings, and then draining their life energies into himself, killing them in the process The exact means by which the Magus transforms other beings is unknown. The Magus must touch his victim to effect the transformation. The Magus can exist in the vacuum of outer space without protection, and can enter and travel through hyperspace at great speed.
The Magus's level of power is immeasurably greater than the present level possessed by his son Warlock. At full power the Magus can grow to the size of a star, rend the star in half without harm to himself, and hurl part of the star through space. It is not known how the Magus can so greatly increase or diminish his amount of mass. In roughly human-sized form the Magus's physical strength and resistance to injury appear to be considerably more limited, although still far greater than human.
Apparently the Magus has limited telepathic powers that enabled him to learn English from the minds of the three X-Men he encountered.