...
The Immortal Elixir was none other than the mysterious liquid floating above the pill furnace.
This liquid, made from the refined blood of beasts with inner strength, contained a profoundly potent life-extending effect.
However, unlike elixirs, this substance was not a one-time ingestible that would extend one's life by about twenty years.
Instead, this substance allowed longevity to increase with each annual intake, with the effects continually adding years to one's life. Its potency was estimated to be stronger than that of elixirs; if elixirs could extend life by twenty years, regular consumption of this substance could potentially add fifty to sixty years to one's lifespan before its potency gradually diminished.
Initially, the use in one year would extend life by one year, and later it might reduce to every three hundred days or half a year.
