Banshee in a Crystal Cave, Watercolor Dream

Create a watercolor-inspired scene of a banshee materializing in a crystalline cave. The banshee is a translucent, flowing figure with a tattered cloak that swirls like mist, pale blue-green skin, and hollow eyes, emitting a faint wailing glow. Surround her with towering crystal formations that refract light into pastel prisms lavender cyan emerald watercolor washes bleeding into rock. The cave floor features a reflective pool; stalactites hang from above; air shimmers with particles of light. Use soft edges, gentle gradients, and delicate textures to evoke a dreamlike, haunting atmosphere. Compose the image with the banshee centered, crystals framing the scene, and glow from crystals illuminating the figure and cave walls.