Therefore, it can be said that those who consume this elixir are actually cursed with the Hulian family's curse of immortality.
This elixir is extremely difficult to refine, mainly because it involves the "Second Entry" of the elixir.
The second refinement of the elixir, as the name suggests, is to take the elixir refined for the first time and put it back into the furnace with other materials, recombining them to refine a new elixir.
The pharmacological reactions involved are dozens of times more complex than the first refining. Mastery of calculations and micro-control all rely on immensely strong Divine Thought manipulation. Without a realm above an Immortal, one simply cannot begin to comprehend it, with the failure rate firmly at one hundred percent. Even an expert in the Alchemy Dao like Xu Nongyou, due to insufficient strength, cannot refine this elixir.
Thus, even if someone figures out the Rejuvenation Pill's formula, it is difficult to replicate it.
