Once an elixir was refined to the Classless level, then the elixir would usually possess an extraordinarily powerful effect. However, even in the Eighteen Blessed and Heavenly Lands' long history, such elixirs had appeared only a few times, and even then, they were mostly just low-grade spirit pills.
But, Tian Jizi, who possessed the Extreme Limit Elixir Manufacturing Technique, had once refined a high-grade Classless elixir, which caused a great sensation. Spirit elixirs were divided into the three grades of low-grade, middle-grade, and high-grade.
The elixirs that were most effective for early stage Fairies were called low-grade spirit elixirs. These elixirs included the Fairy Expansion Pill and the Pure Yang Vital Return Pill.