A dramatic and epic square 1024x1024 image for an audiobook cover. The visual style should be classical Greek fresco or mosaic inspired, with a painterly, slightly textured finish. The main imagery focuses on a stormy sea beneath a turbulent sky, with powerful, stylized waves rendered in deep blues, greys, and foamy whites. Emerging from the water, or standing defiantly against the storm, is a single, iconic, ancient Greek bronze helmet, slightly worn, catching the faint, dramatic light. Symbolism includes the fury of nature, the chaos of war, and the resilience of the warrior spirit. The color palette is dominated by dark, oceanic blues and greys, with sharp highlights of metallic bronze and a touch of ochre in the sky. The composition is dynamic and powerful, with a low horizon line emphasizing the immensity of the sea and sky, and the helmet positioned as a focal point, suggesting struggle and impending conflict. The overall mood is somber, intense, and epic. No text, no letters, no words, no title, no author name.