This is an Illustrious style lora for the character Ultron from Marvel Comics. Specifically the look of Ultron 1320 and his various drones from the comic arc What If? Age of Ultron Vol 1 through 5 in the April of 2015.
A weight of 0.85 to 1 works well with this with most models with best results around or near 1. Sampling Steps of 15 to 35 works well with most models, as does a CFG Scale of 3.5 to 7.5.
Prompts for this lora are ( Ultron 1320, muscular, robot, ).