A female Dungeons & Dragons 5.5 Fathomless warlock levitating above a violent dark stormy ocean, casting Eldritch Blast toward something outside the frame. She is soaked from the storm and sea spray, with wet pale skin, dripping dark hair clinging to her face and shoulders, and deep dark eyes with an eerie abyssal intensity. She wears a wet dark warlock robe heavy with seawater, clinging fabric, torn hems, barnacle-like details, subtle tentacle patterns, deep-sea runes, coral fragments, black pearls, and symbols of the dark ocean depths. One arm is extended as she unleashes a crackling Eldritch Blast, a beam of blue-green, violet, and ghostly white arcane energy cutting through rain and sea mist. In the background, a medieval ship is sinking among towering waves, broken masts, torn sails, lanterns fading in the storm, and sailors barely visible in the chaos. Dark fantasy, nautical eldritch horror, abyssal magic, cinematic lighting, dramatic shadows, heavy rain, crashing waves, sea foam, lightning in the clouds, highly detailed, realistic fantasy art, dynamic pose, ominous atmosphere, 35mm cinematic composition