This is an Illustrious style lora for the character Sentinel from Marvel Comics. Specifically the version of Sentinel from the Marvel live action movie X-Men: Days of Future Past.
A weight of 1 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 3.5 to 7.5.
Prompts for this lora are ( Sentinels MCM, muscular, robot, ).
Sometimes adding additional prompts like ( dark grey black glossy metal body, flawless undamaged body, rich metallic reflections, scale body surface, no mouth, featureless face, glowing yellow eyes, ) can help make the picture. I am not sure what prompt to use to get the scale look as shown in the movie. Instead, the best I can get, is a traditional scale look without turning the character into a lizard or reptile.
I also got interesting looks when I had prompts like ( (detailed texture:1.2), (reflective body surface:1.85), (metallic body:1.3), (complex design:1.5), (modern style:1.2), (powerful stance:1.1), (no visible facial features), (no visible expression), dark environment, (industrial space:1.1), concrete walls, (minimal lighting:1.1), low-key lighting, (rich metallic reflections:1.2), (subtle color variations:1.1), ) when I attempted to get prompts from a site using one of the sample pictures from the movie. It doesn't look like the character, yet the look in the end looked interesting in its own way.