The brother of Infinity, Eternity represents all time in the universe, whereby his sister represents all space and, as already mentioned, together they have a responsibility to maintain the universal balance between life and death. He has been around since before the beginning of the universe, as he is eternal as his name would suggest, and he exists in all places simultaneously and at all times - and he always will. This powerful entity has no physical form, but appears as a male and merely chooses an avatar to communicate with in the physical realm. Eternity can alter space, matter and energy around him to achieve virtually any affect he desires. Like his sister, he can easily best the likes of Galactus and is virtually omniscient and omnipresent.
5. Abraxas
Abraxas is the opposite of eternity and he only came in to being when Galactus either died or ceased to exist. He is, however, more dangerous as he is the embodiment of the destruction of the entire multiverse. When Galactus is alive, Abraxas is actually kept in check (by means of him not actually existing), by Galactus eating planets in order to keep himself alive and prevent Abraxas emerging, but when Galactus does die, Abraxas emerges and all hell can break loose. Shortly after the events of Galactus: The Devourer, for example, when Galactus died, Abraxas was released and immediately sought to destroy not only the 616 universe (the main Marvel universe), but also all other parallel realities as well. Though he was fully capable of easily collapsing entire universes by warping the walls of dimensional space, he didn't immediately do so because he wanted to get his hands on the only thing that could possibly stop him from doing so - the Ultimate Nullifier. Abraxas possesses near-limitless cosmic power, which enabes him to traverse and manipulate dimensions and universal barriers at will. He can also restructure matter and manipulate powerful cosmic energy (usually for offensive and destructive purposes) on a vast scale.
