Omnipotence

Omnipotence is the ability to do anything non-contradictory.

Nigh-Omnipotence

 * God - God possesses near-total, absolute, limitless and infinite power, being able to do literally anything that He desires except he can't kill the Darkness or fight him alone; his power is both limitless and unmatched by everything, except for the Darkness.
 * The Darkness - While unknown the powers or strengths of the Darkness, it's was credited by Death that it took God and His Archangels to defeat and seal it away.
 * Death - Death has immense power far more so than Archangels. The only limits to his power are things that would violate the natural order. Ex. Destroying souls completely, killing the holder of the first curse or Mark of Cain, and not killing the living that are suppose to die are examples of things he can't do.
 * Castiel (temporarily) - Castiel's powers were exponentially magnified as a result of having absorbed millions of souls from Purgatory, although he was still significantly weaker than God or Death, as Death said that Castiel was no God even with 40,000,000 souls. At this power level, Castiel could annihilate even archangels.
 * Archangels - Archangels have a tremendously vast supply of power, but they can't do everything. They can accomplish incredible feats in gestures, finger snaps, winks or even simple thoughts.
 * Jesse Turner - Fueled by Lucifer's presence on Earth, Jesse could accomplish any feat by verbally saying it.