This is an Illustrious style lora for the character Ultron from Marvel Comics. Specifically the look of Ultron 8 - 13 from the 1970s to 1980s. In this era his robotic joints showed less to not at all, he became distinctively more muscular, and he became more edgy looking with the addition of spikes on his upper body. He also canonically started to be made out of Adamantium all the time on average instead of steel, and got more powers like passive self repair and a swarm of nanobots that can consume any material whether it be inorganic or organic.
A weight of 0.85 to 1.35 works well with this with most models. Sampling Steps of 15 to 35 works well with most models, as does a CFG Scale of 5 to 7.
Prompts for this lora are ( Ultron 2nd Era, muscular, robot, ).