a digital intricate illustration concept art of a silhouette of massive cthulhu spaceship, with tentacle on a color lit ocean at night, galaxy, gothic, surreal, dread scary spaceship, stunning massive ornately art, symmetry, natural volumetric lighting, realistic 4k octane beautifully detailed render, 4k post-processing, highly detailed, epic composition, magical atmosphere, cinematic lighting, masterpiece, trending on artstation