How Come I Became a King with a Different Surname When I Married for the Crown Prince?

As soon as Shen Yan opened his eyes, he became a death row prisoner waiting to be executed. Before the sword fell, the Zhenbei Hou Mansion handed over a marriage certificate: Xiao Jingyao, the crown prince, entered the house of his wife, the general, and if he survived the bridal chamber and was summoned by the emperor, he would be freed. But the real prince asked him to marry as a substitute, and also wanted him to die as a substitute. Welcoming brides with military crossbows, bridal chambers with poisonous incense, and fake officials killing each other come one after another. However, Shen Yan discovered that whenever someone pushed someone else's death onto him, as long as he came out alive, he could intercept a skill of the original owner. The princes used him to block swords, the emperor used him to check the frontier troops, and Beidi used him to exchange military honors for his head. But this fake prince, who could be silenced at any time, used a fake identity to perform real military exploits, and went from being a daughter-in-law on death row to becoming the king of Dajing with a different surname.