After learning "Spirit Stacking," Xiao Xian realized that the repulsion of Spiritual Energy is weakest between plants of the same kind, especially those of similar ages. This allowed her to transfer the Spiritual Power from two Dragon's Beard Grasses to one of them, thus avoiding rejection and rotting of the Dragon's Beard Grass.
Xiao Xian had already used such a method when making hangover medicine, so now all she needed to do was to test it again on Dragon's Beard Grass. The two Dragon's Beard Grasses that had their Spiritual Energy extracted shall be called the donor plants, while the last one receiving the Spiritual Energy becomes the recipient plant.
Xiao Xian acted with the trepidation of a nurse drawing blood or administering injections for the first time, extracting the Spiritual Energy from the three-year-old donor Dragon's Beard Grass and combining it onto the recipient Dragon's Beard Grass.
