A full-body, low-angle shot captures a majestic ancient fish monster standing imposingly upright on four robust, muscular legs armored in thick exoskeletal plates, evoking the grandeur of a dunkleosteus-inspired behemoth in a cinematic anime illustration. Its thick, elongated neck supports a massive head encased in a helmet-like armored crest with prominent, crown-like horns extending grandly from the rear skull. From its broad shoulders drape two pairs of enormous, coelacanth-like fins forming a voluminous cloak that envelops its torso, while two additional pairs from the waist cascade like an armored skirt down to its feet, their deep navy-blue membranes shimmering with crystalline gloss along ribbed edges fringed by numerous writhing tentacles tipped with spiked drill protrusions ((intricate details:1.5)). Its powerful arms end in massive, broad hands with five thick fingers—three main and two opposing—clawed sharply at the tips, posed dynamically with one fist clenched forward and the other gripping an invisible hilt. The detailed background features abyssal ocean ruins with bioluminescent flora and swirling currents. (anime style:1.5), (anime artwork:1.5), (masterpiece:1.5), (best quality:1.5), (ultra detailed:1.5), cinematic lighting with dramatic volumetric god rays, lifelike textures on glossy armor and fins, rich in scales, veins, and metallic sheens ((very aesthetic:1.5)), (absurdres:1.5), high contrast shadows and highlights creating an awe-inspiring, otherworldly atmosphere.