A majestic celestial guardian hovers on the precipice of a boundless void, her raven tresses cascading like a dark waterfall refracted by ethereal luminescence. Glass wings glimmer with stained glass hues, harmonizing with bioluminescent glow. Hands clasped in prayer, she appears suspended in divine light, plucked from the heavens themselves. Framed against starry constellations above, bold lines, flat colors, and subtle shading evoke a vintage retro aesthetic reminiscent of Keith Negley's, Mike Mignola's, and Jon Klassen's styles.