A stunning three-tiered underwater cake showcasing a dynamic scene with a sleek ebony pirate ship majestically perched at the apex, and the fearsome Kraken lurking at the base amidst swirling ocean currents in a breathtaking universe diorama. The design features intricate details and intricate artistry, bathed in dramatic lighting that enhances the hyperrealism and photorealistic qualities of the scene. The depth of field effect highlights the interactions between the layers, creating a compelling narrative. Crafted using the power of Unreal Engine, this masterpiece is presented in vibrant 8k resolution with an aspect ratio of 9:16, capturing every exquisite detail of this fantastical maritime tableau.