"Thorn?"
"It's okay, Dad. I can take it from here. Just stay back, by order of the Pumpkin Queen."
Thorn had returned. Jack watched her disappear right before his eyes, but Oogie did not let him fully register his shock, and immediately they were thrown into combat.
However, when Thorn had returned, her mannerisms were different.
Her arms, legs, and half of her face were emanating darkness. Her eyes seemed to be weeping tears of shadow. They cut dangerously at the air around her, and it looked like the power was spiraling out of control. Jack opened his mouth, but Thorn raised a shadowy hand. "It's okay. I can do this," she whispered.
That's when Jack knew. She had disappeared, and when she did, she was given complete control of her power. So, he stepped back, allowing Thorn to take the lead.
"What's this?" Oogie asked. He was growing unsteady, his form barely able to hold even with the distance between himself and Thorn.
"I banish you, Oogie Boogie, here and now, from Halloween Town, and any other holiday you can get your creepy crawly grips on. I hereby banish you to hell, where you belong, and you shall never return or cause anyone else harm ever again!"
Thorn's voice echoed through Town Hall. For a second, there was silence. But with time, Oogie began to shudder violently, his shadowy form unable to stay stable.
Anticlimactic as it was, with Thorn's power, she was finally able to banish the demon once and for all.
Jack turned to his daughter, who slowly went back to her normal form. She beamed at him, and with a tiny giggle, she muttered, "That wasn't the final showdown I was anticipating. You'd think I wouldn't be so overpowered I could just get rid of him with my voice."
For a moment, Jack said nothing. Then, he let out the heartiest laugh he'd ever released. He couldn't believe what came out of his own daughter's mouth, but he knew she had a point, and he was still proud. "I suppose it comes with being a holiday leader, fright sprite," he told her.
"And coming to peace with your inner demons," Thorn added.
Jack tilted his head. "What do you mean?"
"The ghost is gone, Papa. She gave up her life for me, and with her gone, there's nothing holding me back from controlling my powers. I didn't want to accept it, but she gave me no choice in the matter.
"I'm just glad she can rest in peace now."
A soft smile found its way onto both of their lips. Relief flooded the room, and it was time for them to tell the news to the townspeople.