Eldritch abomination, grotesque twisted limbs, bulging unnatural eyes, greenish-blue skin, eerie glowing symbols etched on forehead, worn ancient tome bound in black leather, dimly lit cyclopean ruins, misty foggy atmosphere, flickering torches, foreboding shadows, ritualistic circles of candles, mysterious artifacts, forbidden knowledge, dark magic aura, haunting whispers, Lovecraftian horror, sense of impending doom.