This is an Illustrious style lora for the character Ultron from Marvel Comics. Specifically the look of Ultron Extreme from the comic Avengers Next number 2 in January 2007. It is an alternate timeline version of Ultron from Earth 982.
A weight of 1 to 1.35 works well with this with most models with best results around or near 1.35. 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 Extreme, muscular, robot, ).