Ultron Sigma

Ultron Sigma is the primary antagonist for the storyline of Marvel vs. Capcom: Infinite it is the result of Sigma's consciousness uploaded into Ultron's body as part of their master plan to destroy all organic life and merge both realities in to one with them as it's god. Their golden plated chassis formed after the fused machine held both Reality and Space Stones thanos would later crack the reality stone and the fusion became unstable. Ultron Sigma would eventually gain the soul stone from dante and shed his armor and used the full power of both stones to evolve into Ultron Omega, due to the fused machine's foolishness for not having a noble soul when using the Soul Stone negating sigma immortality and allowing the heroes of both dimensions to finally destroy them but ultron sigma slowly began restoring him self.