I Spent Twenty Years Plotting Rebellion, but the Emperor Thinks I'm Just Slacking Off

Zhao Yuan’s soul enters another world, where he becomes Ning Wang, the twelfth prince of the Great Xuan Dynasty. Everyone calls Ning Wang debauched and cruel. They say that even if every member of the imperial family died, he would still never be made Emperor. But Zhao Yuan has only one goal: to put his cold-hearted, suspicious grandnephew, the Crown Prince’s heir, at ease. Once he escapes his cage, he’ll be a dragon returning to the sea and a tiger back in the mountains! The Crown Prince’s heir wants to weaken the vassal princes? No problem. I’m penniless anyway, so do whatever you like! His imperial brothers want to wage a campaign against the court? Sure! You fight among yourselves. I’ll support whoever becomes Emperor!