One Man Guards the Nation's Gate: I Can Upgrade Without Limits!

Chu Xuan and 196 other challengers were selected and transported to a world where they had to survive for the sake of their nations' destinies.

Each challenger was bound to the fate of a country on Blue Star.

If a challenger was injured, the country bound to them would suffer all kinds of natural and man-made disasters.

If a challenger died, every citizen of the country bound to them would collectively lose three years of their lives!

For every siege monster that entered a city defended by a challenger, ten thousand identical monsters would appear in the territory of the country bound to them and wreak havoc.

Chu Xuan was bound to the Dragon Kingdom's fate. Just as he felt the weight of responsibility on his shoulders, he awakened the special talent Infinite Upgrades, which could upgrade anything and everything.

He upgraded the city walls, turning dilapidated earthen ramparts into sturdy reinforced-concrete walls.

He upgraded the defensive formation, turning an ordinary city-defense formation into the Immortal-Slaying Formation, the most powerful killing formation in the Primordial World.

From then on, Chu Xuan defended his country's gates and destiny alone, with a city as his fortress!!!

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.