Retired Villain Returns to the Throne

The frustrated villain who has been trapped in memories countless times always sighs in despair in the dead of night... "It would have been better if we hadn't put so much water in it" "It would have been better if we had blocked Xinshou Village" "If I had known better, I wouldn't have said so much" But if the protagonist has become a dragon, as a villain, should he regain the throne? Nonsense! Finally, I have a legitimate reason to take revenge!