As a pop culture and comic book expert, I have a deep understanding of the Marvel Universe and its vast array of characters. When discussing the power levels of characters within the Marvel Cinematic Universe (MCU), it's important to consider the context and the narrative within which these characters exist.

Dormammu, a character from the Dark Dimension, is depicted as an immensely powerful entity. He is a ruler of his realm and possesses vast cosmic powers, including the ability to manipulate dark matter, time, and space. Dormammu is a being of immense age and wisdom, having existed for eons and having conquered countless worlds.

However, when we talk about the most powerful, it's not just about raw power but also about the character's influence, resilience, and the narrative significance within the MCU.
Doctor Strange, as the Sorcerer Supreme, is a character who has shown remarkable growth and power. He is a master of the mystic arts and has access to a vast array of spells and abilities that allow him to manipulate reality, time, and space. Doctor Strange's intelligence, strategic thinking, and mastery over the mystic arts make him a formidable opponent to any villain, including Dormammu.

The battle between Doctor Strange and Dormammu in the movie "Doctor Strange" is a testament to this. Doctor Strange uses the Eye of Agamotto and the Time Stone to trap Dormammu in a time loop, forcing him to negotiate and ultimately retreat. This shows that while Dormammu is incredibly powerful, Doctor Strange's cunning and mastery of time manipulation allowed him to overcome this formidable foe.

It's also worth noting that power in the MCU is not absolute and is often situational. Characters like Thanos, with the Infinity Gauntlet, or Thor at his peak, wield power that can rival or even surpass Dormammu's. The narrative and the context of the story play a significant role in determining who is the most powerful at any given time.

In conclusion, while Dormammu is undeniably one of the most powerful beings in the MCU, the title of "most powerful" is not solely based on raw power but also on the character's narrative importance, their resilience, and their ability to overcome challenges. Doctor Strange, with his growth and mastery of the mystic arts, has proven to be a powerful hero capable of standing against and even defeating powerful entities like Dormammu.

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Doctor Strange is the most powerful hero to ever arrive on the scene in the Marvel Cinematic Universe. ... Simply put, Dormammu is Doctor Strange's most powerful and enduring villain. While Baron Mordo may be Strange's chief human nemesis, he is small potatoes compared to Dormammu.Nov 1, 2016read more >>