Author's Notes: This is my first ROTG fic. It was inspired by the ROTG Kink Meme. Prompt is below.

Prompt: Jack is the oldest, maybe not physically, but he's the actual oldest. Ice age, glaciers roaming the land... he's played a big part. Santa would only have popped up like, what? 3-400 years ago? same with the easter bunny and tooth fairy!

Can I just get something where he is the oldest and knows the most? They (the guardians) call on him for help, and a lot of time he doesn't answer because he's got the mindset of a grumpy old man sometimes. He still flies all over and makes it snow, maybe has a couple believers (wiccans maybe?) and remembers when all of them were born.

I think he could have started off as an elemental spirit, if he's older than Pitch and Man in the Moon, and then later changed or evolved as time went on.

Worldly and Wise!Jack please! i can't get enough of it. thanks to any fills!

Prologue

In the dim reaches of his earliest memory, Jack Frost knew a life before Earth. It was misty and distant and in many ways felt like it had happened to someone else. Like most creatures, he could not remember his birth - his first moment of self awareness but he could remember - violently - an ending.

His first memories were of flying - a rush of cold winds and empty space. It was not the blue solitude of earthly skies, but something older, darker - colder. He remembered that freedom with longing - his fragile skin covered in layers ice as he drifted on the solar winds between the stars and planets. Life as a comet had been wild and reckless; while he couldn't remember its beginning, he also couldn't imagine its end.

All things end, such is the way of the universe.

One day, lazily drifting around an unremarkable star on the edge of the spiral galaxy, Jack found himself unexpectedly caught in a gravity well. The blue green planet loomed large in his vision and Jack knew a moment of panic as he realized it was too late to change course. He was moving too fast and the gravity was too strong.

He screamed as he hit the atmosphere. It was hot - burning, a sensation he had never felt before in the cold reaches of deep space. The layers of his ice were cruelly torn away as he fell in a sickening downward spiral, leaving a fiery streak across the sky.

Jack could only watch the ground approach - helplessly caught, his body in agony. In his last moments, he did not fear death so much as he feared the loss of his freedom if he were to survive. He didn't want to be earthbound. He was not meant to be stationary and flightless - moving only as one planet dictated.

He didn't remember the impact.

All he remembered was darkness for many ages after.