Pills were categorized into four classes based on their quality.
Class D pills were the least pure and the least effective, but they were still much better than defective pills. Many cultivators who didn't have much money but still wanted to make a breakthrough would buy these pills.
Class C pills were most people's first choice. They would only go for Class D pills when Class C ones weren't available.
Only the elders had the ability to make Class B pills.
The legendary Class A pills could only come from the principal of the school. They had inscriptions on them. In his test run, Himmel Soan already achieved Class A Healing Pills.
However, the raw materials were ordinary, so he only made Grade 3 Healing Pills.
Pills had nine grades, with one being the lowest and nine the highest. Each grade had its specific guidelines.