Invisible horse

Diana’s eyes were closed.  She stood with her face tilted to the wind, listening, the lasso moving in a lazy, loping rhythm.  The rope seemed to glow in her hands as she released it.  It cut a long, shining path against the gray sky, then dropped around the neck of a huge white horse that hadn’t been therea moment before.  It was as if the lasso had caused the horse to appear.