He strode to the west side of the courtyard, crouched down, and pinched a leaf of a spirit-glow herb near the stone wall with two fingers. He carefully flipped it over on its back.,Unable to directly treat the problem, he could only use his inner qi with caution to carefully separate the black line from the underside of the leaf.,The jade box can slow down the loss of spiritual energy within spirit plants, ensuring to some extent their medicinal efficacy.。