I Guarded the Prison City for a Century; One Punch After Leaving Was Enough to Beat the Four Emperors

Lin Chen transmigrated to the Grand Line and became a guard at Impel Down.

In this world, filled with danger at every turn, he was as powerless as a lamb among wolves.

Fortunately, he awakened the Justice System.

As long as he took part in capturing pirates, he could earn rewards of varying levels.

“Guard a pirate with a 30-million-belly bounty, and get a reward: the ultimate martial arts technique.”

“Guard a pirate with a 50-million-belly bounty, and get a reward: the Ancient Saint Physique.”

“Guard a pirate with a 100-million-belly bounty, and get a reward: the Devil God Tree Physique, with no side effects.”

“Guard Fire Fist Ace, and get a Devil Fruit: Zoan, Mythical Zoan, Azure Dragon Fruit!”

“...”

At last, the Paramount War arrived!

When Blackbeard, Whitebeard, Shanks, and the others all gathered there,

Lin Chen emerged from seclusion.

“Which scoundrel dares come here to die?”

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