Doctor Strange ending explained (spoilers)

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Kaecilius and the zealots have killed the sorcerers at the Hong Kong sanctum and destroyed its beacon; with the beacons at London and New York already broken, Earth has no protection against the Dark Dimension, leaving Dormammu free to invade.

Strange and Mordo arrive and witness the destruction before Strange uses the Eye of Agamotto to rewind time. The pair resurrect Wong, but Kaecilius halts the spell right before the beacon is rebuilt, freezing the group in time.

As Kaecilius describes the Dark Dimension as a reality beyond time, Strange enters and traps himself and Dormammu a time loop; Strange is repeatedly killed, but time resets to the moment Strange arrives. As time does not exist in the Dark Dimension, Dormammu has no control over it. His will is eventually broken and lets Stephen name his terms for the end of the time loop; to leave Earth alone, never return, and to take Kaecilius and the zealots with him.

Time begins to flow in Hong Kong as the rogue sorcerers are dragged into the Dark Dimension. Though the day has been saved, Mordo is appalled by Strange using the reality-bending time magic and abandons the sorcerers. Strange and Wong return to Kamar-Taj, where it is revealed the Eye of Agamotto's time controlling nature is due to the fact it contains an Infinity Stone. Strange is appointed master of the New York sanctum as he accepts his role in the mystic arts.

In a scene set during the credits, Thor visits Strange and asks for his help in finding Odin; this hints at the events in Thor: Ragnarok. In a scene set after the credits, Mordo tracks down Pangborn and absorbs his magic, reverting Pangborn to a quadriplegic state.

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POOPER:
The Eye of Agamotto holds the Infinity Time Stone.The Ancient One is killed,Doctor Strangestops Dormammu and his zealots, Mordo leaves, and Doctor Strange becomes the guardian of the New York sanctum.

LONG VERSION:
Zealots led by Kaecilius kill a librarian and steal pages from an ancient spell book to bring the world into the eternal dark dimension.

Dr. Stephen Strange is a phenomenal and richneurosurgeon whose hands aredamaged in a car accident to the point he can no longer perform surgery. Strange expends all of his financial resources to find away to restore his hands, alienating his colleague and former paramour Dr. Christine Palmer in the process.

Strange is directed to Kamar-Taj in Kathmandu by Pangborn, a paraplegic who regained the ability to walk. Strange discovers that Pangborns ability comes from the use of sorcery learned from tutelage by the Ancient One and her disciples, including Mordo and Wong.While studying, Strangediscovers the Eye of Agamotto, an ancient relic that holds the Infinity Time Stone.

The zealots use the stolen pages to begin summoning Dormammu the lord of the dark dimension, which destroys the London Sanctum. Strange learns there are two other sanctums in New York and Hong Kong, which prevent Dormammu from entering the earth realm. Strange encounters the zealots in the New York Sanctum, where they kill the Ancient One and Strange attains the Cloak of Levitation.

In Hong Kong, it is discovered that the zealots have opened the doorway to the dark dimension which begins to suck in the world. Using the time stone, Doctor Strange enters the dark dimension and traps Dormammu in an infinite time loop, where they experience the same moment over and over again. As Dormammu becomes exhausted, Strange proposes that he will break the loop if Dormammu leaves and never seeks earth again. Dormammu agrees. Strange breaks the loop, returns time to before the gateway was opened, and Kaecilius and the zealots are sucked into the dark dimension.

Realizing the Ancient One had been using powers from the dark dimension to gain immortality, Mordo leaves. Strange takes up residence in the New York Sanctum as its guardian.

Mid credits - Strange offers to help Thor and an off screen Loki to find Odin on earth.

Post credits - Mordo confronts Pangborn for using magic to break the laws of nature, and re-cripples him by taking away his power.