The stakes of "The Heavenly And Primal” are presented early on. With its opening two scenes, the show lets us know that the lives of Marco Polo and Kublai Khan are in imminent danger. The pre-credits scene shows Marco working with the Mongolian engineers to build a working trebuchet that will allow them to hurl flaming rocks at the walled city from a distance that keeps them safe from archers. The trebuchets are working, but they are not firing far enough. They need to be bigger, Marco demands. His life depends on it.