graphic novel book cover art, comic book style, bold lines, flat colors create an illustration featuring a male character with iridescent blue green skin and piercing yellow eyes, set against a backdrop of foreboding storm clouds and a distant mountain range shrouded in mist. the style should blend elements of ancient mythology and mysticism, with intricate details and textures that evoke a sense of solemn reverence. the character is depicted in a moment of contemplative stillness, as if poised at the threshold between action and reflection. his attire consists of a weathered, gemstone encrusted mantle that hangs heavy around his shoulders, along with ornate, plate armor etched with symbols of ancient wisdom. the color palette should feature muted tones of indigo, slate, and umber, with flashes of gold and silver that seem to emanate from the character's very being. the overall mood of the piece should be one of solemn anticipation, as if the character is about to embark on a profound journey or unlock a hidden truth.