What is Magic?

[anagogy]

That sentence should have read like this instead: "When we ALL (that is to say everyone and everything) becomes all there is once more, a new octave of experience is then ready to be manifested. For now the next octave is only in potentiation."

Isn't the Buddha in the next Octave?

Yes and no. And the same goes for you.

Ever faced a mirror towards another mirror and watched the reflections seemingly go on forever?

Octaves are a lot like that. They are reflections within reflections within reflections. All there is is consciousness, which we might describe as "Clear Light". Everything that you can perceive is a distortion of that Clear Light. Everything is contained within that light. This is infinity. Everything exists and always has. All times. All places. All spaces. It all exists within this light. It is All Being. But it only appears as an octave of densities in distortion. Any environment of objects which we might perceive is just an infinitely minute cross section through that infinite plenum of everythingness. In the 8th density, there are no densities. There only appear to be densities when you have, by free will, elected to experience distortion again.

It's not even necessary. It's just for fun. It is chosen as an alternative to understanding the complete unity of thought that binds all things.