As sadistic as this is going to sound, I want that whole kingdom to burn from the top down. The prince can take a fat #*!@ up his bum. The sister can get %^/~d and tormented by the folks of the slums for all I care. The duke/father can get his chunky body flayed and mutilated, cooked up, mixed with his own filth, and forced fed until he implodes on himself. The knights can become slave miners for the rest of their lives. The whole capital can suffer the flaming wrath of the dragon!
Edit: How could I forget. The new head Mage guy. Yeah. He can have his tongue ripped out, fingers split down the middle, elbows and knees smashed, nose severed off, a burning steel rod stuck down his ure#>?&, and ultimately left to the piranhas below the waist while slathering his upper body with honey to attract wasps and other insects.
... hmm... maybe I’m too invested in how dumb everyone is...