Create a highly detailed and dramatic illustration of Shadow Fiend from Dota 2. Shadow Fiend should be depicted as a menacing, demonic figure with a skeletal structure and dark, shadowy essence. He should have a menacing aura, surrounded by dark, ethereal flames and shadowy tendrils. His glowing red eyes and the glowing runes on his body should stand out, highlighting his dark power. The background should be a dark, infernal landscape with hints of hellfire and twisted, ghostly figures. Emphasize the contrast between the dark shadows and the glowing red and orange elements to capture the sinister nature of Shadow Fiend