The Empress's Family Drama

I transmigrated, became Female Emperor, unified the world. Then, the System appeared. Mission: 'You are The True Heiress of Lord Chandler. Begin the Family Drama! Put The False Heiress and your biased family in their place, and make them regret everything!' Family Drama? Not even a dog would— System prompt: 'Rewards! Including gunpowder and cement.' I, the Emperor, will! I love Family Drama!