When embedded with all six Soul Gems, the Infinity Gauntlet granted its user with unlimited power and the ability to do nearly anything they wished. No other weapon in the entire universe could ever come close to its power except for one. Known only as the Heart of the Universe, this was the only weapon that held more power than a fully outfitted Infinity Gauntlet. While the Infinity Gauntlet gave its user the powers of a god, the Heart of the Universe straight up made its user a god, and the ultimate being of their respective universe, with them being only below the one above all. Very little is known about the origin of the Heart of the Universe, other than that it existed in the Earth 4321 Universe, and was supposedly created to balance out the good and evil within that particular timeline. The weapon itself appeared as a blinding ball of light, almost like a mini star that was the size of a small building. Thanos was the only known user to use the Heart of the Universe at its fullest extent. When he consumed it, the power he gained was unlike anything he could have ever imagined. He became the most powerful omnipotent being in the entire universe in an instant, and now had the abilities to kill anything that stood in his way with complete ease. Having used the Infinity Gauntlet prior to the Heart of the Universe, Thanos was able to describe the differences between the two weapons upon reflection. While the Infinity Gauntlet had given him control of all time, space, power, reality, the mind and soul, its usage was purely an external control. All that power came from the Gauntlet itself, not directly from Thanos. The Heart of the Universe, however, was the opposite. It granted all these powers, and more, directly placing them within Thanos himself. He finally became the master of the universe he was in, and nothing stood in his way. All the other cosmic entities that would have proven to be a challenge, even with someone with the Infinity Gauntlet, were pushed aside like flies by Thanos following his consumption of the Heart of the Universe. However, so much power was too much for even a strong-willed man like Thanos, as he would go on to accidentally destroy the entire universe by making it as if it never existed. He would eventually be able to use his power to restore the universe he originally erased, but at the sacrifice of the Heart of the Universe, which was removed from reality following the restoration of the Universe.