An ornate antique key with a feather quill head glows in a dark arched stone doorway within a cave, fantasy art.

A single ornate antique iron key, its head shaped like a stylized feather-quill, held upright and glowing faintly amber at its core, floating in the center of a vertical composition. Behind it, an arched stone doorway deep underground, carved with faint spiral sigils that catch the same warm light, fading into cold blue-black shadow at the edges of the frame. Dust motes suspended in the light beam. Painterly digital fantasy illustration, dramatic chiaroscuro lighting, rich warm amber against deep indigo-blue, detailed stone texture, atmosphere of ancient mystery rather than horror. Strong empty negative space in the upper third and lower sixth of the frame for title and author text. Portrait orientation, book-cover composition, in the visual tradition of modern YA fantasy covers (Sarah J. Maas, Leigh Bardugo). No visible characters, no readable text, no watermark. Ver más