The Road to Revenge Begins with Turning Evil

[The heroine transmigrates, knows medicine and poison, can fight, and has a pocket dimension. There are underworld schemes, power struggles, absurd comedy, and hilarious characters.] Xia Wanyun has barely transmigrated when she's told she must marry a prince who's on his deathbed. Rumor has it he's ugly, but worse, any woman he marries is doomed to die young. Staying alive comes first. She has to call off the wedding! What? You say an imperial marriage decree can't be annulled after seven days? Then surely I can ask for a letter of divorce, right? With the mysterious pocket dimension she inherited, she grows medicinal herbs and crops, and before she knows it, she's become a renowned miracle doctor and master farmer. Yan Guilin was stripped of the throne by treacherous ministers, beheaded, and left without a trace of his remains. Moved by pity, Heaven gave him a second life. Now he'll become the most ruthless man in the world and kill every traitor and scoundrel under the sun. He trains in martial arts under a master and endures countless battles, eventually becoming the undying Yan, a name that strikes fear throughout the martial world. What? You want to call off the wedding? (Quietly wipes his sword.) This prince is indebted to the princess consort for saving his life again and again... May I ask if you have feelings for me?