The small group of three took out a small orb as they approached the forest. The miasma sucks out a cultivator's spiritual energy before it sucks out their life force, killing them. That is, if they survive the small patches of poisonous herbs inside that may or may not release toxic poisons into their surroundings. The orbs contained small shields that kept out the miasma of the forest for a time.
The green robed girl seemed to think of something for a bit before she turned to the girl wearing snow blue robes. "By the way, Shue'er, do you think you can keep the spiritual power in our body from leaking using acupuncture?"
The second girl tilted her head with a look on her face. "I can try... but there's only a ninety percent or so guarantee."