Lone armored warrior before a colossal mountain citadel

A lone, stoic warrior, armored in obsidian and gold, stands at the precipice of a colossal, unfinished citadel carved into a mountainside. Below, a vast, empty plain stretches to the horizon, bathed in the ethereal glow of twin moons. The sky is a tempest of swirling cosmic colors, hinting at a divine, mythological conflict. The image should possess a dramatic, high-contrast lighting scheme and a grand, epic scale, rendered in a style that merges traditional oil painting techniques with digital surrealism, akin to the epic fantasy landscapes of Frank Frazetta and the mythological themes of John Singer Sargent.