Of course, it was not that easy to break through to the earth grade. Strictly speaking, old people like them had almost no hope of advancing.
On one hand, they were too old and their potential had long been used up. Even if they had enough experience, they might not be able to successfully break through the barrier.
On the other hand, the tidal pill was a fake Earth-grade pill to begin with, and the momentum of heaven and earth it contained was very thin. At most, it would only allow them to touch the threshold of earth-grade.
Even so, the first elder would not give up on this opportunity. After all, the difference between the peak of mystery grade and the fake Earth grade was like a chasm!
In endless city, there were many alchemists at the peak of the mystery grade, but the number of people who had broken through to the mystery grade could be counted on one hand.