Set after movie
Let it snow
In a way, all humans were Mother's children. Jack had been, before he died.
"Ma'am." Jack greeted, not calling her as a mother like other season spirits. Jack was child of Moon. He would never call her mother.
"Congratulation Jack. Heard what happened." They haven't spoken much through the years, but Mother had been the first who had seen this frozen child. Explained what he was and what his job was. How much he had then hoped that Jack would be her child, that she would be able to really help him through the years. But the Man in the Moon had chosen the other and longer, so much harder way to show Jack his path.
Again he had been right.
Jack seemed happy and Mother smiled. After when she had lost so many winter shepherds, there finally was someone who wouldn't just fade away. This child was more than just a winter bringer. Now Jack was a Guardian of Childhood, Guardian of Joy. And it seemed that Jack had finally found his answers and his rightful place among the spirits.
"Have you spoken with him yet?" She asked and Jack looked up the sky and the moon. He looked surprised, like he was hearing something.
"Go Jack. He's waiting you." Mother whispered when she stepped closer.
Jack looked back in the workshop, watching the celebrating yetis, and the elves and guardians and some other spirits who he had never met before.
"Say them…" He hesitated but smiled then again watching them such a warmness that Mother had ever seen anything like that coming from any Winter Spirit. "Tell them I come back soon."
"I tell." She promised.
And the wind picked Jack up and he flied higher and higher until he disappeared into the night.
"Let it snow Jack." She sighed. "Let us feel your happiness tonight."
And it snowed.