The Beyonders

The Beyonders are a omnipotent (but not omniscient) alien race that exist outside the omniverse (basically living beyond all of reality, time, space, and the dimensions).

Powers and Abilities

 * Omnipotence: The Beyonders omnipotence have been shown to kill a non-corporeal entity who can only be killed by God itself which who the Living Tribunal. They were also able to create, warp, and destroy countless universes at whim.
 * Omnipresence: The Beyonders were shown to exist in any and every timeline even with their fight with the Living Tribunal they were battling across all of realities taking out everything and anything on a whim and those who pose a threat to them.
 * Nigh-Omniscience: The Beyonders were shown to lack full omniscience as they couldn't save themselves from Dr. Doom and Molecule Man. (Should be noted that it was mostly plot that got them killed.)

History
The Beyonders had first came to the attention of Earthlings (unknown if at this time to the cosmic beings) when they hired the alien Sphinxor to steal the Counter-Earth for their museum of curiosities (Molecule Man during secret wars mentioned that they were more curious than a cat), They were described to be like space scientists and creators of countless number of different universes to them.

They warped reality to certain extends and even the great Living Tribunal knew of their existence but did nothing until they attacked the Marvelverse. The reason for this was because they did it on a "Whim" killing all the known cosmic entities and races which includes the Living Tribunal, the Celestials, Eternity, Infinity, Master Order and Lord Chaos, and even the In-Betweener on-panel, doing it in every reality and all dimensions while the destruction of entire worlds happened. It should be also to clarified that they used the Marvel Omniverse as a mere Nursery for their babies, which are referred to as Cosmic Cubes like the Beyonder.