The pain surpassed fairly quickly once Shu XinYi consumed the fairly ordinary yellow dew drop. This essence could be acquired by the tiny dull yellow stones, each stone can produce atleast one drop, enough to save a life. The method to turn the yellow stone into a dew drop can be done thorough few methods, it just so happened that Caesar the protagonist discovered 2 relatively difficult methods, which were burning it under fire until only the essence was left behind, and pressuring the little stone until the essence was squeezed out.