A Pirate's Life, Starting as an Undercover Agent

Thanks for the invite. I'm in the One Piece world, and I just became an undercover agent.

After transmigrating to the world of One Piece, Gray discovered that it was full of treasure chests in different colors. Only he could see them, and when he opened them...

"Ding... Obtained a five-star character card: Natsu Dragneel. For thirty minutes after use, gain all of this character's power."

"Ding... Obtained a five-star skill card: Super Shinra Tensei. After use, permanently learn this ninjutsu."

"Ding... Obtained a five-star item card: Hyorinmaru. After use, obtain the Zanpakuto Hyorinmaru."

Gray swallowed all the raging flames around him in one gulp. The icy wings on his back fluttered as he slowly rose into the sky. He opened his scarlet Mangekyo Sharingan, gazed down at the Holy Land of Mary Geoise, and said:

"How many floors can a bag of rice carry?"

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.