My Only Talent Is Perseverance: I Grind Immortality

His sect preached peace, but the world devoured the weak. Daily, his once-proud Feitian Sect surrendered territory and paid tribute, while grotesque demons feasted on cities and human lives were cheap. Reincarnated as Ye Yang, a seemingly ordinary, talentless disciple in this crumbling sect, he watched the endless humiliation and the slow march to extinction. His father had died for this folly. His talent was average, his bones weak. But he possessed a unique [Perseverance] destiny, a secret cheat that defied conventional wisdom. This wasn't a flashy system, but a relentless drive, quantifying every precise swing of his sword, every deep breath of cultivation, every secret session by his hidden spiritual well. Day by day, he grinded, building an unyielding, terrifying foundation, secretly surpassing his peers while they mocked his \"enduring cub\" reputation. They called him diligent; he was becoming a weapon. Now, a critical mission arises, entwining him with manipulative clans and internal rivals, threatening to expose his truly hidden strength. Will Ye Yang choose to continue his silent ascent, or will he unleash the devastating power forged by a decade of unseen, relentless practice to shatter the illusions of peace and save his dying sect from its self-destructive path, carving a new destiny with his blade?