Although magic is only just now beginning to become a prominent element in the MCU, it has existed as early as 2011's Stephen Strange starting out as a skeptic while dealing with magic firsthand.

Wanda Maximoff's official transformation into the Scarlet Witch and Doctor Strange's trip through the multiverse undoubtedly open up countless magical possibilities, which have to be clarified with an official explanation. Before that, Agatha Harkness has already been established as a seasoned witch who knows how magic works and how it can be harnessed. WandaVision suggest there's a different way to learn magic than the Ancient One's standardized learning in the world's three Sanctums, and confirm that magic can be either learned — as is the case with Agatha, Strange, and Karl Mordo — or acquired naturally, as happened with Wanda, Billy Maximoff, and Loki.

However, there's much more to magic than learning how to use it. As The Ancient One and Kaecilius revealed, magic can tie into other dimensions, which can become so dangerous that the Earth can be plunged into eternal darkness. Some individuals may know the effects of magic on the multiverse and different timelines, while others can simply tap into it intuitively and others, like Dormammu, are basically made out of it. There's also the issue of fate and ancient legends, such as Doctor Strange's path to becoming the best Sorcerer Supreme and Wanda Maximoff's possession of the legendary Scarlet Witch title.

Just as chaos magic has become so easy to digest.