A monstrous nine-headed serpent, hydra, terrorizing the region of lerna

a monstrous nine-headed serpent, hydra, terrorizing the region of lerna, each time a head was cut off two new ones grew in its place, detailed serpent anatomy, dramatic lighting, fantasy, dark and gritty, highly detailed, 8k, cinematic, chiaroscuro, moody atmosphere, dramatic composition, elaborate scales, piercing eyes, gaping jaws, photorealistic, masterpiece