Beyonder

The Beyonders are an extra-dimensional extraterrestrial race that exist outside the Marvel multiverse. They have no physical appearance, but the child unit they describe and known as the Beyonder had interacted with the universe during Secret Wars they and the beyonder can take on any form it desires. The race was responsible for the creation of the Cosmic Cubes, artifacts of immense power that could actually take on a life and shape of its own, like its siblings Kubik and the Shaper of Worlds. This Beyonder was retconned to have been an incomplete cosmic cube until it fused with Earth supervillain, Molecule Man, becoming a complete Cosmic Cube being. However, this was retconned even further a few decades later. Even still, the Beyonder retained his ability to casually warp reality just as he had done during the Secret Wars event it is describe he can crunch a universe into a Toy. Recently, when the Marvel Multiverse was collapsing due to events known as incursions, the Illuminati had sent Hank Pym (also known as Ant-Man/Yellowjacket) into the void between universes to seek out the one named entity Rabum Alal known as the Great Destroyer who was believed to have started the first incursion. When he returned 8 months later, he revealed to his team that he did not find Rabum Alal, but instead something worst the Beyonders, athey are the major party involved in the incursions. He explained that he had witnessed them effortlessly slaughter a number of cosmic entities, including Celestials, Eternity, Infinity and even the living multiverse the Living Tribunal, effectively damaging the multiverse even more so and casing the early death of hundreds and thousands of universes down to the Earth-616 and the Ultimate Universe.