Exiled from the Start, the Cannon Fodder Rises to Become an Empress

[Confiscation and exile + medical skills + System + devoted couple + pocket dimension + strong heroine + satisfying revenge + world-building]

The heroine is incredibly powerful, almost inhumanly so. She never lets herself be pushed around, and she ruthlessly takes revenge on anyone who crosses her.

Xie Tang, the little princess of the underworld, transmigrates with a System into the body of an unloved daughter of Prince Pingnan in a small world.

She is exiled from the very start.

The male and female leads of this small world are idiots, and the world has collapsed three times in a row. The world's Heavenly Dao appealed to a higher power, and Emperor Fengdu picked up the signal. That is how Xie Tang came to transmigrate.

Xie Tang has always believed that revenge should never wait until tomorrow. She immediately takes one of the original heroine's arms, then clears out every treasure in Prince Pingnan's manor, leaving not so much as a single hair behind.

The emperor has barely settled into his position before he starts settling old scores. No matter: even the journey into exile will be exciting. She turns the emperor's brothers and sisters against one another, using one enemy to kill another and letting them fight among themselves first.

As for the forces and followers the original male lead prepared in advance, Xie Tang simply takes them over, leaving him with nothing to show for his efforts.

The road to exile is chaotic, with disasters striking one after another. Xie Tang has a pocket dimension and a System, and her supplies are plentiful. Along the way, she gathers a powerful force and picks up a loyal puppy-boy, too.

When she reaches her place of exile, Xie Tang simply declares herself emperor.