Loki's mother, Frigga, is the source of his magic prowess. Although he makes numerous appearances in the MCU, his magic knowledge and talent are extensive, and he primarily uses illusion.
Sylvie, one of the most potent Loki characters in the MCU or the comics, is a master of magic. She mostly specialises in enchantment and has the power to coerce some people into doing what she wants.
Due to his extraordinary knowledge and wisdom, Wong currently holds the title of Sorcerer Supreme in the Marvel Cinematic Universe. He appears to know more about mystical writings and artefacts than Doctor Strange does.
In the Doctor Strange in the Multiverse of Madness mid-credits scene, Clea's abilities were barely touched upon, although she still demonstrated significant strength.
In Marvel Comics, Agatha Harkness is one of the most potent magicians, and the same is true in the MCU.
The Ancient One's seeming immortality allowed her to serve as Sorcerer Supreme for countless years.
When Hela seized and destroyed Mjölnir, she immediately displayed her amazing magical power.
Dormammu numbers among the most powerful magical beings in the Marvel Universe.
Strange escaped death thanks to the Time Stone hidden within the Eye of Agamotto and exploited the fact that the Dark Dimension exists beyond time.
The Scarlet Witch rendered Doctor Strange and the entire magical contingent at Kamar-Taj powerless in minutes.