Begin Your Immortality by Guarding the Lonely City

The vast frontier fortress, the weathered garrison, the floating silver threads, the blood-stained battle robes... Three thousand veterans have guarded the frontier alone for decades without reinforcements or reinforcements, vowing to defend the isolated city. The enemy troops poured into the city like a tide. Faced with heavy siege, the veterans were all brave and refused to die. The new energy spreads to the golden watch, and the cold light shines on the iron clothes. A general died in a hundred battles, a strong man died in ten years... And none of them returned. Ringer traveled here and awakened the system in the final battle. Killing enemies can gain lifespan, and consuming lifespan can upgrade martial arts. From then on, one man and one gun guarded Mobei, even in the face of thousands of troops. The sun, moon, mountains and rivers are still there, don't cry, veterans, have a good journey...