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 upper body and no legs, instead having a swirling, shadowy vortex where his legs would be. He should have dark, shadowy essence with glowing red eyes and glowing runes on his body. He should exude a menacing aura, surrounded by dark, ethereal flames and shadowy tendrils. 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