KingZayd wrote...
The closest explanation to making sense is that the Leviathans designed the Crucible, and maybe ensured the plans were passed on from cycle to cycle, under the expectation that if they wait long enough, one cycle would be able to sneak it onto the Citadel. As they don't care about the cycles themselves, it doesn't matter how many get wiped out before success.
As for the nature of the design (little more than a power source), I honestly don't know.
I have a theroy.
There is a possibilaty that the race that adapted it to link with the Citadel planed to use it as the power unit to transmit massive amounts of Dark Energy through the Cidatel - the largest Mass Relay in existance, and therefore, capable of minipulating more Dark Energy then any other structure, including the standard Relays.
Therefore, it's possible that the Crucible was ment to be the power source to waponize the Citadel itself, using it's dark energy emmisons as a weapon against the Reapers. After all, Dark Energy (same power as in botic fields) is something I doubt they would be able to defend against, and finding a way to use pure dark energy as a weapon against the Reapers is ingenious. If only that kind of thing was expanded on to use as a possibilaty in the endings.
To explain how this would work in the endings:
supposedly, this would mean that a massive wave of Dark Energy would be send out on a wavelength that would devastate advanced A.I. lifeforms, but pass over organic ones, as long as the power of it is finely tuned, lest it just incenerate everything. Then, it sends a burst of this Dark Energy to the Relays, which replicate the new energy, and then disperse all the Dark Energy they contain, in order to blanket the entire galaxy. This would be the Destroy Ending.
Also, this Dark Energy could be used as a signal blanket, that could send a signal across the entire galaxy that the Reapers respond to. The signal, sent out by the new Shepard A.I.-Catalyst, which has not become the new governing intelligence of the Reapers, would effectively rewrite every Reaper quickly and effectively, transmitting new directives through the pulse, like a burst signal. This would be the Control Ending.
Okay, Synthesis is something I do not understand at all how it is possible. So my theroy on this may not be accurate.
To sum up, this would be almost exactally like the "JC Denton" Ending of Deus Ex: Invisible War, in which every human is nano-augmented.
This would be the same. The Pulse is a blanket of nano-machines (I know it's an asspull. Just go with it like Project Lazarus) is created from the half-synthetic DNA of Shepard, mass-synthesised within the Citadel. These are transmitted by the wave or Dark Energy, which affects every being at the cellular level, with the molecules containing the Nano-Machines implanted directly as they envelop Organic and Synthetic tissue. Then, a beam of Dark Energy shoots this Nano-Machine bearing Dark Energy (God, that sounded stupid) into the Relays, which copy and replicate the Dark Energy, and the Nano-Machines within, before despersing them throughout the galaxy.
...Okay, so I have no real idea on Synthesis being dispersed across the galaxy like it is. But the other two are possible.
.....Although, this is admittedly speculation on my part. Just my personal theroy to throw out there. Weather or not you believe it, or even consider it a possibilaty, is yoru choice.