Beigong Yu was naturally not asking for these medicinal ingredients just for fun. He planned to have Taoist Zixiao refine an archaic pill known as the Creation Pill.
The greatest utility of this pill was its ability to defy the heavens and alter destiny.
In other words, after taking this pill, one could borrow an additional 500 to several thousand years of lifespan from the heavens, depending on the tier.
Chapter 249