One Piece: Killing Pirates Raises My Stats, and I Will Become Invincible

(No female lead, just killing pirates. Doesn't follow the same path as Luffy.) After transmigrating into the world of One Piece, he suffered one misfortune after another. The System failed to finish binding, and his life hung in the balance. Luckily, he happened upon Akainu, a Marine Admiral from the North Blue, and finally found somewhere to go. Mulandes Ka'er: “Killing pirates raises my stats. I'll kill, kill, kill, kill, kill, kill, kill!” Small-time pirates, big-time pirates, Gin, Luffy, Ace, Shanks, Big Mom, Whitebeard: come on, I'll take on every one of you!