Create a celestial-inspired nail design that captures the ethereal essence of aura energy. Each nail should showcase a harmonious blend of pastel colors, mimicking the gentle ebb and flow of an aurora borealis across the night sky. Incorporate soft gradients and subtle iridescent glitter to emulate a mystical glow. Consider adding delicate, fine-line detailing to reflect the intricate patterns of spiritual energy for an added touch of sophistication.