Anime girl swinging a glowing sword in crystal garden

anime style. A large, covered garden with a large, elongated, hexagonal, bright crystal hovering above it, illuminating it. A girl with dark eyes, long, knee-length dark-black hair fading to white, a bun adorned with long light feathers, dangling long earrings with light feathers, and a smiling face. The girl wears a tunic-style shirt with wide sleeves and sewn-on dark feathers with a black eye. The tunic-style shirt is black with dark white accents and light trim, wide-legged pants and a long light belt with light feathers and a black eye. A grypsman-style skirt is black with dark white accents and dark trim, and white socks and sandals. The girl holds a long sword in both hands. The sword has a light-colored blade with an engraved image of a black snake. The handle is made of dark materials, and a long, light ribbon of material is attached to the pommel, fluttering in the wind. The girl swings the sword, leaving the blade's trajectory visible.