Ling Zhenfei looked around, thinking about how he could enter the room without anyone noticing that the guards had been controlled.
Zhenfei thought of a brilliant idea. Long Mixiang was a Spiritual Medicine that drove people mad. Though the guards were not in the hall, there was no door between the hall and the passage, and they must have smelled the scent of Long Mixiang, although the effect was not enough to drive them mad yet.
The idea Zhenfei had was to keep these guards from being so alert by making them confused and groggy.
Thinking of this, Ling Zhenfei suddenly remembered a treasure within the Heaven-Dropping Essence Marrow—a special flower.
This flower, known as "hundred days drunk", was originally quite beautiful, but it had a strange property. When used in making alcohol, a pinch of its powder in a large vat could drastically increase the potency of the alcohol and produce a heady fragrance.