Act as a concept artist with 10+ years of experience designing dark fantasy characters. Create a MidJourney portrait of a [fiery-eyed demon] with [glowing ember-like pupils] and [crackling, molten skin patterns]. The character should exude an aura of menacing power, with subtle smoke rising from its shoulders and horns curling like twisted flames. Emphasize intricate details such as jagged, obsidian-like claws, a faintly glowing rune etched into its forehead, and a background of [smoldering ruins] lit by an ominous red hue. Use a cinematic composition to highlight its intimidating presence, blending hyper-realistic textures with surreal, infernal elements. Set the mood to evoke fear and awe, ensuring the demon feels otherworldly yet grounded in a darkly fantastical aesthetic.