Eternal Cosmos Emperor: Shocking the World After My Engagement Is Called Off

I am Emperor Hengyu, invincible throughout the ages, yet I was betrayed by my closest friend and reincarnated as a good-for-nothing hostage prince of the Great Xiao Dynasty. After lying low for eight years, I return to my homeland only to be told to marry an icy female war god. Everyone thinks I'm a pushover they can bully at will. Sorry, it's time to come clean: I am the only immortal in this world!