C94 Pill refinement = risking his life?

The old fogey let Ling Xiaotian pluck a piece of Bluesilver Grass to protect him while he placed the rest of it into the Universe Ring. After that, he cut off a piece of the Five baht grass's stem and roots and put the rest back into the Universe Ring.

"Don't tell me that's all you need?" Ling Xiaotian looked at the leaf