Pariah Dark

Pariah Dark is an antagonist from the original show and the main antagonist of the Danny Phantom special Reign Storm and the main antagonist of the story A Royal Return. Here, he is depicted as the father of Princess Dorathea and Prince Aragon, with whom he tries to take over Dorathea's kingdom, and then the rest of the Ghost Zone. Aragon breaks the Spell of Forever Sleep over his father so they can both get revenge on Danny and Dorathea. 
However, he is defeated by the combined efforts of Danny Phantom and Princess Dorathea, and their allies. AFter they have been overpowered, the Observants find a prison stronger than Pariah's sarcophagus for both Aragon and Pariah.