Create a highly detailed oil painting of a mecha on a Fiend's Sanctuary, inspired by the style of Gu An. The mecha should be in a dynamic pose, with a tall, epic presence. The background should feature a bright, uniform blue and white sky, with hints of red mist. The mecha should be holding an axe and have a wing attached, with a long white beard flowing in the wind. The artwork should be rendered in a realistic, high-fantasy style, with a focus on sharp focus and lifelike details. Specifically, include elements of one galaxy, a Roman numeral clock, and a sense of movement. The output should be a high-resolution digital painting, optimized for display on Artstation.