If four worlds are too many i apologize... but my beloved land of Oz needs a Renaissance, in a matter of words. So, welcome, traveler from beyond the rainbow, welcome, to Oz...
(Oh, yeah, and read from the first post)

Reveal: Jack's Mentor

"Alright," the girl said."You're learning pretty fast, Jack."
"Thanks! But," Jack looked at her as seriously as he was able."When can I learn some of your shadow-magicks?"
"Those," she smiled."Are mine, and mine-"
"PRINCESS!" a black mage ran towards them.
"Halt!" on the other side, a young woman in military uniform- General Jinjur- strode up to them. "Madam, you are under arrest for illegal use of black magic-"
"The princess ain't goin' anywhere," Kakashi grabbed the girl." But to her home-HalloweenTown."
"Wha-?" Jack was confuddled.
"Jack, I guess it's time you learned my name," the girl smiled her wide, haunting smile."I'm Jill Skellington- First Daughter of The Pumpkin King."
A sudden peal of thunder resounded above them.