Forced to Marry an Old General, I Replaced My Legitimate Daughter as the Concubine

[No cp, the heroine goes dark and takes revenge, group portraits of women] His biological mother died tragically, and his sister was tortured to death by the prince. The cold-blooded father got promoted by selling his daughter and wanted to give her to a cruel general in his sixties to pay off his debt. Desperate, she devised a plan to replace her legitimate daughter in the palace and became an unpopular concubine. At first, she just wanted to kill everyone in the prime minister's house and pay with blood. Later, I saw that the royal family was dirty and the emperor cold-bloodedly condoned all crimes. She tore into pieces the meek skin and transformed into a demon concubine who brought disaster to the country. Charming the king, disrupting the court situation, killing the prince, and overthrowing the imperial power.