<My theory is that the OG race the Traveler enriched began to spread their influence throughout known space, planning to start colonies on other worlds. The pyramid was sent with the intention of terraforming Earth, but its journey and eventual crash landing led to the Moon being formed. However, it still managed to start the process.>

Gotcha. So would that make the Pyramid a servant of the Traveler, no?

<Not after the Gardener rejected them. Basically what I'm saying is. Enrichment -> spread of influence and tech -> discovery of other races -> war -> rejected by the Traveler -> depression -> found by Darkness -> Pyramid Armada and the race full gets their hands on the acausal power the Gardener had but never bestowed. This would make their old tech turn to Darkness as well as they turn from instruments of peace and well-being to instruments of war and destruction.>

Oh I see now. The pyramid is not one of the "original" humans but whatever race enriched them. This except I think threw me off: "A pyramid of pure power with the ability to terraform...") and did so wherever they landed. One just happened to land on Earth, causing the planet to split and create a Moon from the rocks left behind by the impact. The pyramid, from the Moon, began planting seeds that would lead to an eventuality millions, BILLIONS of years down the road. Meanwhile at home, this race began turning violent and egotistical in fanaticism for the God that gave them power. The Gardener came to them, not anyone else, so they begun exterminating other life. This God gave THEM power, THEY had divine rule, no one else. They furthered the course of the universe by doing this, the corruption of absolute indomitable power."

<No I did mean humans, I just don't want to call them that because giving them a vague tag makes it so it's open to outside interpretation, though humanity seems the most likely. Bungie's good at making alien races, I don't see why they'd turn to the "overly humanoid" method unless it really meant something.>

That is a good point. You know, there is another option. It is possible that, were we to be of Eliksni descent, the pyramids interior and inhabitant would have appeared as suitable for Eliksni physiology. Perhaps the pyramid mimics what ever is most suitable for its desired target/s.

<Potentially. That is if it is capable of shifting the interior space to that degree. That would turn my mind.>

Nothing but speculation so far, but somethingto be considered perhaps.