It's been a long time coming, she thinks.  Her goodbyes have been said, her family hugged close, before this moment comes.

To be honest, she can't be sure she's ready even now, armed and armored with the best equipment she could find, make, or buy, having studied the lore of a thousand worlds in as much detail as the Tribe had, having workshopped her wish with those who dared wish for the dreams of their hearts rather than something more circumscribed, more fit for the Tribe than themselves, no matter that her goal is as useful to the Tribe as it would be anyone, because there's nowhere that has nothing that's broken or breaking --

Eventually, though, the time comes when all that is left is to do.

She still takes a moment to just stand before the Fountain, and get used to it, as memories flash through her head.

Then, taking a sprinter's start, she dives in, her momentum pushing her through where her will might dare to falter; there's no use turning back now.

There's a voice in her head. As she floats in the depths of The Fountain, neither rising nor sinking.

Welcome Young One, have you chosen the wish of your heart?

"I suppose I have, though truly, the wish of my heart is poorly expressed when I must put it to words.

"Still, if words I must put it into...

"There's not a single world, neither here nor anywhere else, that doesn't have something that's broken or breaking, making people's lives worse to live for its absence.

"I want the knowledge and power to fix it, whatever that thing may be."

That is not a wish I can grant. Perhaps you have another?

Her lungs are protesting just a little, her training at holding her breath means she still has time but not for a long exchange.

She is calm.  This is a fact about herself, no matter how much she would like to be frustrated right now.  Calm helps her hold her breath.

"I want the ability to fix things - both the knowledge of why something isn't working, and the power to repair it, because neither knowledge nor power alone actually solve the problem by themselves."

If that is your wish, I shall grant it. Are you sure you are ready to begin your Sojourn?

"As sure as I can be."

Then it is done. You may depart whenever you are ready.

And with a full-body exertion, she breaches the surface with a gasp.

Then...she looks over her rucksack full of junk, because where everyone else saw something broken...she saw things that could be mended.

The soft glow of bioluminescent plants and moss around her light the area. Four waterfalls gently fall at the edges of the cave but the moss prevents the sound from being too loud. The fountain she just left has water spilling out of nowhere falling in strange, ever-changing patterns in defiance of gravity before falling back into the pool she just emerged from.

Broken things glow subtly, she can tell they're not actually glowing just... highlighting them for her to look closer. A water purifier, a tablet, a broken enchanted flashlight, a multitool.

And look closer she shall; she'll start with the flashlight.

She wasn't sure her power would work that way...but she's glad it seems to.

Her power whispers into her ear; the crystal at the center of the flashlight has cracked and its mana has been depleted. This is the sort of tooling she would need to disassemble the housing and replace the crystal properly...but with her power's help, she can cheat: Unscrew here, focus the heat of a fire to make the frame flexible enough to squeeze the crystal out. 

Fixing the crystal is harder; she needs a source of mana to draw from and some source of the right elements to replace the bits of the crystal which dispersed when it cracked. Her power allows her to purify those elements from mundane materials without much difficulty. With those purified she can dissolve them in solution and, with her power's help, catalyze them depositing on the right parts of the crystal to make it whole, then channel a bit of mana from some other source to jumpstart the enchantment again and patch the broken edges of the magic.

...say, is the Fountain (and its water) a source of mana, perchance?

That small whispering voice advises her that it isn't but it draws her attention to the enchanted staff she has with her. She would need to be careful not to pull too much mana and break it but with care she can take an amount it can recover from without needing repairs of its own.

Well, that would certainly work, and it's less risk than taking from her knife.  She will probably need the enchantments on that much more.

She'll see what else she can fix before she sets off.

Well, in addition to the bits she's already looked at there's a sleeping bag that's fraying a bit around the edges and has some small holes, a broken tent pole, a small foldable table that doesn't fold as smoothly as it should, two pieces of a longer rope they're usable individually but mending it would give her more flexibility, a chipped cup, a spare firestarter that's too rusted to work, a somewhat bent fork, and a small solar panel that doesn't work as efficiently as it did when it was new.

And of all these, what can she fix with what she has on hand?

(She asks, while taking a sample of the bioluminescent moss.)

Some of it she'll need to harvest things from the outer garden but otherwise yes. The moss, her power whispers needs this humidity level and these nutrients in the soil to safely take root. 

She nods, moving garden-wards, and wonders if she can make something to maintain that environment for her sample.  It would hardly function as a sample if it died, after all.

There's a sense of a muscle pulled taut, and the little voice of her power whispers not yet.

The outer garden is as bright and cheerful as she remembers but it's quiet in a way she's never really known. The emptiness is strange, usually you can always hear at least the sound of distant voices or spot some harvesters collecting one thing or another... now it's just her.

Well, she doesn't mind having privacy; honestly, she's a little looking forwards to having a personal space the whole Garden wide.  Regardless, she can get comfortable later - it's time to repair stuff.

Her power whispers to harvest a bit of fibervine here, a bit of fastwood there, some of that herb and a few of those berries.

Then it begins the process of getting her to make replacement parts, guiding her through various tasks to make what she needs for repairs: thread to repair the sleeping bag and the rope, a type of wood glue to fix the tent pole, a lubricant and making a replacement washer for the folding table, a clay mixture to repair the mug, and a collection of refined powders that no normal person could dream of using to repair the solar panel.

This is the stuff that dreams are made of.

Eventually, however, she is done, and ready.

"Well, then.  Bottoms up, as they say somewhere in the multiverse."

She eats a rainbow berry, after plucking a 'few' more and taking a cutting (just in case)...and activates its power.

There's a moment of discontinuity as the world is briefly replaced with a wash of sensation, the smell of cyan, the feel of something sweet, the taste of the number fourteen, and then the maelstorm disappears in turn.