Ye Chenfeng could tell that the Southern Mountain Old Demon's lifespan could no longer be extended with elixirs. He must have taken quite a few lifespan-boosting pills in the past, leading to a resistance.
However, this was not an issue for Ye Chenfeng. He had Mutated Longevity Fruits in his little world, and a single fruit could extend one's lifespan by a thousand years, continually stackable without any adverse reactions.
The Southern Mountain Old Demon was struggling to comprehend this. He knew his physical condition well, that his lifespan was not easily prolongable. Only the heavenly treasures from the great families in the Upper World could help extend his life. The Hes, being a dominant family in the Divine Origin Realm, surely possessed even those extinct lifespan-extending treasures.
