The Best Little Poisonous Concubine

Once she traveled through time, she was actually put on the body of an ugly girl. She was punished and thrown into the cold palace. However, an imperial decree came down and asked her to marry a vicious prince from another country! It's okay, if the soldiers come to block it, the water comes to cover it, and if you can't beat it, use poison. If the poison doesn't kill you, I will use the thirty-six strategies to escape.