Ultron was always a favorite villain of mine as a kid, which is too bad for me because he’d kill me without a single thought. Not only is he a robot devoted to the propagation of artificial life forms over biological but he’s also dangerously insane to boot. He also has an indestructible body so you can’t just smash him. What fun!
He wasn’t quite as indestructible in his cinematic versions, but who knows? With sequels available, we’ll see.
References: [wikipedia.org: Ultron]
[Dr. Strange in the Multiverse of Madness] [2022] [armed security robots for the Illuminati; ranged energy attack from hands; ]
Metahuman Database 