Create a highly detailed, cinematic, and atmospheric digital painting of a robot on a volcanic ash background, inspired by the works of Artgerm, Greg Rutkowski, and Alphonse Mucha. The robot should have a broken ruin armored core trunk, flexing large muscles, and be surrounded by a cybermagnetosphere. Incorporate elements of dark matter incarnate and thunderstrike. The style should be reminiscent of Baiōken Eishun and the Colossus of Rhodes