After Ten Years of Sign-In, I'm Invincible With the Sword Intent of Royal Authority!

Sun Xiu inexplicably transmigrated into the world of One Piece and awakened the Godslayer Sign-In System. From the start, signing in rewarded him with the Sword Intent of Sovereignty.

But this Sword Intent of Sovereignty was a technique that burned through his life force.

Fortunately, his subsequent sign-ins awarded him the Bat-Bat Fruit, Vampire Form, which could keep him forever young.

Sign in at Loguetown and receive the "Three Types of Haki" as a reward.

Sign in at Windmill Village and receive the "Eternal Mangekyo Sharingan" as a reward.

Sign in at Sabaody Archipelago, sign in at Sky Island, sign in on the sixth level of Impel Down...

Whitebeard: "Sun Xiu beat me the very first time we fought, and now he can kill me in an instant! He's the strongest man in the world!"

Roger: "Without Sun Xiu backing me, I wouldn't dare dream of becoming the Pirate King!"

Sun Xiu: "The Pirate King? I'm not interested. If I'm going to rule, I'll rule the whole world! I am the law of this world!"

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