Gothic sorceress with purple magic in a dark stone hall

A full-length digital illustration of a beautiful, pale-skinned young woman with long, wavy black hair standing in a dark, gothic room. She has a slender, elegant figure and a calm, focused expression, looking down at her hands. She wears a floor-length, sophisticated dress that features a structured black velvet bodice and outer robe, with a flowing, cream-colored silk skirt underneath, accented with a black silk corset with silver buckles. She wears a black necklace with a striking star-shaped pendant around her neck. She exudes a radiant, ethereal purple magical aura that swirls from her right hand to her left. The background is shadowy, suggestive of an arched doorway or window, with stonework and faint, flickering candlelight. The lighting is dramatic and cinematic, the cool purple magic contrasting sharply with the deep black and warm gold tones of the surroundings. The overall effect is mystical, sophisticated and reminiscent of high fantasy.