This is an Illustrious style lora for the character Ultron from Marvel Comics. Specifically the look of Ultron as shown in alternate covers for the Age of Ultron story arc that came out in March of 2013.
A weight of 0.85 to 1.5 works well with this with most models with best results around or near 1 or 1.35 depending on the checkpoints used. 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 Ascension, muscular, robot, ).
Sometimes adding additional prompts like ( multiple arm, ) can help when making results similar to the covers that show Ultron with multiple arms.