Omnipotence

There are different definitions for Omnipotence:

• The ability to do anything non-contradictory. This definition prevents logical contradictions.
• The ability to do anything, this definition leads to logical contradictions.

The problems occur by asking questions like "Could God make a stone so heavy he can no longer lift it?" If he can't do it, then he is not omnipotent because he should be able to create such a heavy stone, if he can do it, then he is not omnipotent, because he can't lift the stone. There are many variations of the problem, for example: Could God create something stronger than himself ? As no character in the Supernatural Universe is omnipotent by either of these two definitions, no such problem has arisen on Supernatural.

Characters with this ability

Omnipotence

No being in the Supernatural universe is truly omnipotent in the sense of the common definition of the word.

Nigh-Omnipotence

Entities of nearly unlimited power that can create conscious beings, new realities, or at least warp them to an unlimited extent.

• The Darkness - The Darkness is the most powerful being in existence. God, her younger brother, stated that even with all four archangels fighting against her the first time, along with himself, victory was barely achieved. Even after withstanding a combined but sequential attack by powerful supernatural beings during a second confrontation, she still stopped God from trapping her again, overpowering both him and Lucifer at the same time, and fatally wounded her brother before regenerating fully and walking away.  Not long after, upon reconciling with God, Amara was able to heal the fatal damage her nigh-omnipotent powers did to him, without any difficulty.
• God - God possesses near-infinite power, being able to do almost anything that he desires. It is shown that he isn't fully omnipotent, as he can't instantly kill his older sister, the Darkness. However, through his own power, he was able to create beings who helped him defeat her, although barely. Being almost omnipotent, he also has the ability to give himself more abilities, among those were the ability to speak French and play guitar.
• Death - Death holds immense power which is far greater than Archangels. According to himself, he would reap God at the end of time. However, there are many things he can't do.

Lower Tier Nigh-Omnipotence

Entities of nearly unlimited power that are weaker than the top tier.

• Archangels - Archangels have a tremendously vast supply of power, they can accomplish incredible feats of power such as obliterating and banishing common Angels with gestures, finger snaps, winks or even simple thoughts. However, there is still much that they can't do: find humans who are protected by enochian sigils, forced possession of a vessel, or breaking out of Lucifer's cage.
• Castiel (temporarily) - Castiel's powers were exponentially magnified as a result of having absorbed all the souls from Purgatory. At this level of power, Castiel could annihilate lower Archangels with a snap of his fingers and (supposedly) erase Hell from existence. However, he was still keen on keeping Michael and Lucifer locked in the Cage.
• Metatron (temporarily) - Empowered by The Word of God, his angelic powers were greatly enhanced and common angelic weaknesses like angel blades or holy fire proved to be ineffective against him, but he was still very far from nigh-omnipotence.

Extremely powerful

Entities of immense power, that can apparently warp reality or destroy and create things to a limited extent.

• Jesse Turner - Fueled by Lucifer's presence on Earth, Jesse has accomplished incredible feats of power such as exorcising a demon by verbally telling them to leave their host, turning an Angel into a figurine, conjure beings into existence simply by believing in them, etc. According to Castiel, at the peak of his power, Jesse would have been able to destroy the entire host of Heaven with a single word.

See also

• Omnipresence
• Omniscience
• Reality Warping