terrifying horned monster emerges in dimly lit corridor with menacing claws and intense stare creepy creature concept art for

aggression gory eerie dark beast spooky character fear nightmare horror movie scene halloween monster fiction intense alarming sinister fiend graphic grim creepy horns fright mystic menacing danger concept art bloody scary imagination nightmarish disturbing haunted creature dread terror chilling corridor otherworldly terrifying ominous macabre claws demonic design terrorizing grotesque horned emerges dimly lit stare themes generative