Creating the formula for a Ninth Grade treasure pill is something that the vast majority of alchemists throughout history wouldn't even dare to imagine.
Even creating a pill formula from scratch is quite a difficult task for many people.
Although there is an unwritten rule in the alchemical world that when alchemists exchange pointers, they should share a formula they have personally researched and developed—otherwise, things can get a bit awkward—the vast majority of these are not even considered real medicinal pills, but rather unranked medicinal powders.
Chapter 366