How did I become an immortal while playing a game?

Mu Ye transmigrated into the world of cultivation with a game system, becoming a menial disciple of a third-rate sect. With no hope of ascending to immortality, he simply gave up and immersed himself in the game world, grinding away relentlessly.
In reality, he is a low-level cultivator who spends his days mining, weeding, and farming, living a mundane life of a 996-style immortal cultivator.
In the game, he wreaked havoc, cleaving through ten demons with a single strike in "Swords and Demons," becoming the savior of humanity; in "Under the Sky," he forged the True Martial Body, shattering the heavens with a single punch, earning the title of Grand Void Martial Ancestor; in "Beasts and Heaven," he transformed into a colossal beast, devouring the heavens and earth, ruling over all beast races, becoming the supreme being among beasts…
Keep working on it, until one day...
"Huh? How did I become an immortal?"

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