The blind diviner really didn't lie to Xin Yue.
Those herbs that he gave truly were the most potent and best of its kind.
But there was one problem…
Using it on regular players or creatures that appear inside certain stages would most definitely deal much damage.
Especially on those that have no resistance to toxins.
However….
There just happens to be an existence in the team that can heal basically any type of wounds in Xiao Fanyu's party.
During the third level when the whole group were still weak enough to tether on the edges of death without rest.
The enemies that appeared specialized in different kinds of poisons.
A continuous repeat of getting injuries laced with poison then being healed to full health have allowed the group to develop a resistance towards toxins and foreign substances.
Including the herbs Xin Yue brewed.