very terrifying cenobite cephalopod squid octopus demon splattered with blood, full body portrait showing entire scary monster, brown bristle hair, neo-expressionistic, maximalist, horror monster masterpiece, trending on DeviantArt, 4K resolution, dark cinematic, hyperrealism, octane render, volumetric lighting, ultra-detailed, chiaroscuro, dark blue ocean background, deep underwater, in the style of Giger and Ralph Steadman and Da Vinci,