Transmigrating into The Bad Guys: The System Orders Me to Become Emperor from the Start

A transmigration so mortifying it makes you want to crawl into a hole brought me to this world. I became Li Xingyun, a prince of the Tang dynasty. The Bad Commander, Yuan Tiangang, wanted me to restore the Tang, so I retaliated by giving him a System and showing him what it means to have an overpowered cheat. My fate is mine to command! And it is also Heaven's to command! Heaven's Mandate is mine! I am Luotian! A Great Golden Immortal, beyond the heavens: that is what it means to be me, Luotian. Who says you have to change your name when you transmigrate? I'm not changing mine. So what if it's the Heavenly Dao? So what if it's Yuan Tiangang? Even the System has to obey me. I am the protagonist! Li Xingyun wants a carefree life. I, Luotian, want everything. What you don't want, I'll take. What you do want, I'll take too. In this life, I started out completely baffled, but ended up free beneath the heavens. As for that plot? Only an idiot would follow it!