Antiguo dragón cubierto de musgo durmiendo sobre un tesoro en el valle

An epic fantasy landscape: a massive ancient dragon, covered in moss and small trees, sleeping atop a pile of gold and ancient treasures in a misty valley. Scene: the valley is surrounded by towering peaks, waterfalls cascade from the cliffs into a misty lake below, and the dragon's slow breathing creates gentle gusts of wind that rustle the treetops. Subject: the dragon itself — majestic, ancient, its scales a mix of weathered stone and deep bronze, one eye slightly open, watching. Important details: visible treasures — gold coins, gem-encrusted swords, ancient tomes, all partially buried in moss and dirt, tiny birds nesting on the dragon's horns, a waterfall cascading over the dragon's tail. Lighting: golden hour sunlight piercing through the mist, warm amber and soft blue, god rays illuminating the treasure. Use case: fantasy book cover. Constraints: photorealistic, epic scale, no watermark.