A mystical ancient glowing white Spirit from a dark fantasy RPG, resting in an ornate gothic stone sarcophagus. She appears as ethereal, translucent humanoids made of starlight and mist. She is wearing very old, tattered silk robes and intricate silver jewelry. Dim candle lighting, cinematic shadows, mysterious and eerie atmosphere. Concept art style, high detail, ethereal and solemn, dark underworld cave sanctuary.