This is a normal Alchemist.
And it is his deliberate doing.
Otherwise, if he had refined them all into perfect-quality second-order lower-tier pills—
It would not take long for him to become a slave solely refining pills.
After refining a sufficient number of second-order lower-tier pills, Su Yu took out the materials for the second-order middle-tier Kaiyuan Pill that he had prepared. Compared to the second-order lower-tier Kaiyuan Pill, the middle-tier pill required materials of higher quality and age, and nearly twice the quantity and variety.
Thus, the difficulty of refining a second-tier middle-tier Kaiyuan pill was quite high for Su Yu, who had only just reached the first layer of the Foundation Establishment Realm.
Three days passed in succession.
Su Yu had failed six times in refining the second-tier middle-tier Kaiyuan Pill. The quality of the pills refined was subpar, rendering them as waste pills.