dark fantasy book jacket art, dark baroque painting style, dramatic chiaroscuro candle lighting in the style of Caravaggio, Geralt of Rivia in an austere tailored black velvet doublet dancing a slow intimate waltz with Yennefer of Vengerberg, raven-haired sorceress in a form-fitting midnight-black silk-and-velvet gown with silver embroidery, glittering obsidian star pendant catching dramatic highlights on her throat, pale skin, violet eyes locked with his amber gaze, palatial banquet hall with towering arches blurred in atmospheric candlelight, deep obsidian, velvet black, tarnished silver and muted violet palette, elegant vertical book cover layout --no text, typography, title, letters, font, scars, cartoon, 3d render, watermark --ar 9:16 --raw --v 8.2