The Infinity Buster is a weapon in Marvel vs. Capcom: Infinite. It was used by X to destroy the antagonist Ultron Sigma.
Story[]
As the Infinity Stones were too dangerous to be used by themselves due to their great power, suggested Iron Man create a device to harness their power. Using the technology from Sigma's laboratory in Abel City, Iron Man and Thanos created the Infinity Buster to harness the power of four Infinity Stones. After its completion, Iron Man gave it to X during the final battle against Ultron Sigma, now Ultron Omega. While charging the Ultimate Buster, X began shaking and had to use his Ultimate Armor to handle its great power, while being supported by Doctor Strange and Morrigan's magic. It fired a powerful beam capable of destroying Ultron Omega.