Zhang Yan held a Transformation Technique in hand, acquired from Zhou Chongju, originally a secret technique transmitted within the Zhou Clan of the Yuxiao Sect.
Initially, the White Moon Ying Fruit was scarce, and he followed the technique without noticing any issues.
But later during the refining process, he gradually discovered that the Essence Qi refined from a single White Moon Ying Fruit was far from his absorption limit.
Perhaps this technique was excellent for those forming second-grade elixirs, but for him, it was somewhat lacking.
Those who form first-grade elixirs, besides needing much more external materials than their peers, can also absorb spiritual mechanisms far beyond ordinary people. It is like comparing an ocean that can embrace all rivers to a lake that overflows when full,
