A majestically layered underwater cake featuring a majestic black pirate ship sailing atop, with the ferocious tentacles of a Kraken curling at the bottom, set within a stunningly designed cosmic diorama. Crafted with intricate detail, the scene is enhanced by dramatic lighting, achieving hyperrealism with photorealistic elements. The composition employs depth of field and enhanced rendering, akin to Unreal Engine, all presented in ultra-high definition, 8k resolution, in a captivating 9:16 aspect ratio.