Prompt: Standing sentinel before the foreboding gates of the abyss, the malevolent Hellhound guards the entrance to the infernal realms with a fearsome presence. Each of its three heads possesses a sinister and predatory aura, their gnashing mouths revealing razor-sharp fangs that gleam with a malevolent intent. The creature's fur is ablaze with an unholy fire, casting an ominous glow and intensifying the aura of dread that surrounds it.