MTL - One Piece: The Soul Purchasing Pirate - Chapter 841 found it

She fought in the Battle of Changping and witnessed the killing of hundreds of thousands. She once led the Qin Iron Calvary and battled against the Six Kingdoms. She has seen a third of the land and witnessed the breaking of mountains and rivers. The sound of a grand zither and the light of a great female emperor. A prosperous world that was forged on the battlefield. Yet, these two thousand years are forgotten from history.

- Description from Novelupdates

Mu Wan Qing was dressed as cannon fodder playing a female supporting role in a book about a reborn female protagonist.

The heroine was her amazing and talented cousin. She was reborn on the way to exile, and she devoted all her clan to help her ascend to the backyard of the Emperor.

And Mu Wan Qing’s whole family was used as a stepping stone and was destroyed on the road of exile.

Mu Wan Qing: I am so tired, let’s destroy it.

In the chaos of the house raiding scene, Mu Wan Qing hurriedly grabbed the marriage certificate with a swoosh.

During the breaking up of the marriage, Mu Wan Qing exchanged the marriage certificate for a mule cart and twenty taels of silver and started a long journey of exile.

In order to survive, she resorted to roasting pig trotters, making fried chicken, farming cotton, and breeding sheep.

Engaged in building water power, building cities, building cement roads, and creating a prosperous fortress in the south.

Accidentally played a big game, and the plot was really shifted…

The Reborn Cousin: Everyone is concentrating on building infrastructure, how can I play the script of the palace fight?!

At the palace banquet, the arrogant and arrogant frontier master sat alone while pouring the drink. There was a commotion at the door, and the beautiful and heroic first female assistant, Mu Wan Qing walked in surrounded by everyone.

The man put down the wine glass and quickly ran over, with his eyes full of love, he said, “Madam, I can’t eat without you.”

There was an uproar at the scene.

- Description from Novelupdates

Venshiro, a young ronin bound to the Black Vein Blade, is hunted by clans who would kill for the curse he carries. Every time he draws the sword, it takes something from him—his memories, his soul. But the blade remembers everything.And now, it wants more.

“Miss, since you came back, every three days there will be someone who start a rumor to slander you……”