#powers;

Infinite Longevity/Fearlessness:

Dr. Strange's lifespan has been extended and his fear of dying subsided in a manner similar to that of his mentor the Ancient One, due to a successful contest against Death. Though he can still be killed and even physically wounded he cannot succumb to any medical diseases, nor does he age. However, he still requires food, water, oxygen, and sleep, same as a normal human.

Doc passed a test by the Ancient One and defeated Death, or more accurately, accepted Death. [ Doctor Strange Vol 2 #4 ]. As a result, from that moment forward, Doc stopped aging. "Death may come only from without, in battle-- and not from within."

The Ancient One had once passed the same test himself, and lived only 600 years, whereas Stephen has lived for 5084. From that moment forward, a glowing ankh appears on Doc's forehead when he is in a situation of great danger and his death is imminent, "when Doc most needs a reaffirmation of life." [ Doctor Strange, Sorcerer Supreme #45 ] 

Universal Awareness:

By performing mediation Dr. Strange has sensed anomalies in time and space allowing him to protect against time travelers, extra dimensional invaders (Example: Dormammu, Nightmare), space aliens, ect.

Astral Projection:

Doctor Strange can release his astral form from his body, instantaneously and at will. In this form he does not need to breathe, eat, drink or sleep, is unrestricted by physical laws (for example, Strange has flown beyond Earth’s atmosphere, defying gravity with ease to speak with Iron Man), is invisible (though can be seen by any if he wished it so), intangible, and incapable of being harmed by all but the most powerful and rigorous of mystic means.