Prompt: The malevolent Hellhound stands before the ominous gates of the abyss, guarding the entrance to the underworld with a terrifying presence. Each of its three heads emanates a sinister and predatory aura, with gnashing mouths revealing sharp fangs that gleam with malicious intent. The creature's fur is ablaze with wicked flames, casting an ominous glow that intensifies the surrounding aura of fear.