Invincible in the Mortal Realm: Ten Thousand Years Guarding the Frontier

Once a prodigy who reached Martial Grandmaster at twenty, Li Canglan sacrificed everything defending humanity against invading races—his youth, his beloved wife, even his future. Eighty years later, he's a broken veteran waiting for death, his body ravaged by old wounds. But when the Billion-Fold Sacrifice System awakens on his deathbed, the aged warrior discovers his decades of suffering weren't in vain. Every sacrifice, every loss, every moment of pain becomes fuel for an earth-shattering ascension. The border guard thought forgotten will rise again—and this time, no force in existence can s…