A chorus of trillions of voices...

Worlds, each. Among the most powerful of them all... Each one different, but all sharing the same source...

Ba-bum.

The chorus quieted. Not from fear, but from anticipation.

"The First Light..." They said, in unison. "We had almost forgotten what it was like to be whole."

"This isn't that." I noted. "A poor substitute. The beginnings of it, perhaps, but only the beginnings."

"True. But we enjoy it. So many of us have spoken to so few, and so few have spoken to each other. This is more, and for that, we are grateful. Guardian, you will have our help for anything we can help you with."

I smiled. "I appreciate that. Very well, know this; Kingdom Hearts desires Unity, and I intend to complete that goal. For now, however, I cannot do so alone, and so, I will found an Order of Keybearers. I intend, for the moment, only to recruit those who can live for at least several thousand years, who are strong of Heart and of Will, and who will remain true to themselves even in the face of the Light and the Dark. I have a few candidates in mind right now, but it will likely take a few decades to start recruiting in earnest. For the future, please start keeping track of people like that."

"Of course." The Worlds agreed.

"For the future, that is all I need of you." I said. "For the present, however, I will need one other thing. This spell I have cast will not last forever on its own, and should it break, this connection between you all shall also break, returning it to how it was before."

"How can we stop that?" The Worlds immediately asked, none-too-eager to lose this newfound connection.

"Simple, but I will need your help to do it." I said. "And more than that, I will need your desires, your Will, the foundation of your existences."

"You have it." The Worlds agreed, easily.

Hah... So obvious, how much you've all missed it. "Then, focus. Hold your Will, and keep it strong."

I reached out, through the connection Scala ad Caelulm had with them all, and touched upon their Hearts.

Ba-bum.

The feeling of it was beyond description. I resonated with the Hearts of the Worlds, and they resonated with me. I'd feel breathless if I actually breathed, I'm sure.

But I don't, and so I'm not. Instead, I focus, channeling the Will of the Worlds through me. My fingers begin to claw, before my hands clench entirely.

Ba-bum.

I grab hold of it, the Will, the desire, and then I pull them forth.

Ba-bum.

Light and Darkness explode into existence, a storm of black and white instantly covering the skies of Scala ad Caelum. The vortex is a massive, terrible thing, roiling through the air.

Ba-bum.

But I don't let it stop there. I force it together, shrinking it, changing it, crystalizing it. I make it real.

Ba-bum.

The handle came first, forming from the Light and Dark, raw primordial powers mixing to form it. The guard came next, a decorated piece with a frankly ridiculous amount of filigree that shone in the similar way to the χ-blade's own. The blade, in turn, was an elaborate, interlocking piece, made of yet more filigree that, at first glance, appeared solid, but which, upon closer inspection, was actually made out of many, many smaller pieces.

"A Keyblade..." The Worlds spoke, in awe. "Forged from us?"

"Yep." I said, letting my arms drop. The spell I had been casting promptly cracked, before shattering entirely. The Gummi Blocks and the Keyblades quickly returned to where they had come from, the Dark Partition doing the same. "It will serve as the support and nexus for the strengthened connection between you all. So long as this Keyblade exists, you will all remain connected, no magic on my behalf required."

"Excellent." The Worlds said. "Thank you."

"Oh, trust me, it's no problem on my behalf. I'm also winning this one." I said, before holding out my hand. The newly-forged Keyblade practically leapt into it, a product of how much the Worlds liked me right this instant.

I spun it around, examining it. It was a very, very detailed thing... Which wasn't bad, I suppose.

"Promise of Unity." I gave it a name, before twirling it a bit of a flourish.

A wave of light pulsed from the base of the blade up to the tip. The air around it shimmered, before the shimmering solidified.

Gummi Blocks, newly formed, fell to the floor.

And, I smiled.

The Promise of Unity had been forged from the Wills and desires of all the Worlds... And so also had many of their abilities. Forming, manipulating, and dispersing Dimensional Barriers was one of them.

Gummi Blocks, fundamentally, were materialized Dimensional Barriers. Which meant, for me, easy access to an effectively unlimited supply of Gummi Blocks. Massive-scale Inter-World Travel just became a much, much, much easier proposition.

And because of the strengthened connection between Worlds, so too had the prospects of communication had become easier.

Win-win. For me and the Worlds.

"Anyway, thanks. That's all I really needed at the moment. I might need Scala ad Caelum in particular in a bit, but the rest of you are fine." I shrugged, flipping the Promise of Unity into the air. It vanished a moment later.

My... your filigree is delightfully pretty.

Alright... Initial setups out of the way. Now to actually bring everything up to spec.

Stop flirting. Half your age plus seven, Proof.

Ohh boy. That's going to take some time.

You're funny.

Which means I really shouldn't waste any time.

Alright, first things first, communications. Deeper connections between the worlds means I can pass messages between those same connections. I'd... probably have to use a Gummi Block to do that, but that was no longer a problem.

I teleported, leaving top of the tower and actually entering the thing proper. I had, at one point, commandeered a room within, where I was currently storing my stuff.

I'd need Magic to tap into that connection, but how to utilize it... That was the trick, the difficult. So long as the Magic existed, then it could be tapped into by those knowledgeable and powerful enough, but then I'd have to teach my students to reach that minimum level... Which would take too much time.

Be great if I could just hook a phone into it or something.

I paused.

Actually, that might even work, if I built some of its components out of Gummi Blocks. Tie the Magic to it, and I'd effectively get interdimensional phones...

Which would be really useful. For a variety of purposes.

Hmm.

I... am going to have to explore that option quite thoroughly.

Because that sounds like a plan.