Okay, Author here. I wasn't expecting anything out of this so it's great hearing feedback! To answer OPP's questions both the DU and HU are not set in the same universe here. With all the fancy stuff the vex have I figured it wasn't too much of a stretch to give them an interdimensional portal. So they're in alternate universes, hope that clears that up. As for the time difference, the overall timeline in the Destiny universe is REALLY vague. But roughly from the discovery of the Traveler (early to mid 21st century) to the present (Season of Dawn, sorry Cayde fans) it is about two thousand years, give or take a couple hundred years, so I'm putting them at the year 4522 in the Destiny Universe. [ Timeline for those interested. . ] As for the Spirit, I had them find the vex planet only 10 years after the shield world to give the Halo universe a slight chance of success against the covenant. In the year 2541 it would give the Spirit about a year to run around Destiny's Sol system and gain stuff to take back to the UNSC before they reach the point of no return. (I consider the Battle of Phi Serpentis, or Admiral Cole's last stand the beginning of the end for the UNSC.) And I'll try to work on Guardian Ghost dialogue OPP, this is my first fic and it's kinda hard writing something that could either be floating next to you or chilling inside your head. Still, today the SOF encounters both the Guardians and the Leviathan.

03/05/4522

Location: The Last City, Vanguard War Room. (AU, if I say that the Vanguard at least rebuilt their planning room at the new tower location then they did.)

Persons of interest

Ikora Rey: Warlock Vanguard

Zavalla: Titan Vanguard

Raz-22 + Sparks

Saint-14: Legendary Titan

Ikora POV

"This is concerning…" I say as I gaze at the diagram of the massive vex gate. "Could they be preparing for a full assault on the leviathan… as retaliation for the destruction of Argos?" theorizes Zavalla. 'Only thinking in terms of military power as always.' I smirk to myself. "Unlikely, the vex never build gates this big for good reason. A standard vex gate could send you from one end of the universe to another in the blink of an eye. There is only one thing a gate of this magnitude could be used for." I say with confidence. "SO it is going to The Black Garden!" Raz-22 shouts. "Or some form of Vex dimension anyhow. It could be anything from the Black Garden to an some vex ascendant plane for all we know." I tell Raz-22. "What exactly the gate leads to remains to be seen, what we must do it plan for whatever could come through it. Raz, I hope you left some form of monitoring equipment near the gate, we cannot be caught unaware if our enemies, both Vex or other, hope to utilize it." Zavalla asks the hunter.

Swoosh

With a flash of light, Sparks materializes next to Raz's head. "No problem Zavalla, we left behind a hidden beacon to monitor the gate for activity." The ghost reports confidently. "Good, Ikora, we need the best for this, I will ask the Guardian to go to Nessus and appraise this situation personally. In the meantime I would like you to ask Osiris to look for information on the gate in the Vex Network in the Infinite Forest." Zavalla commands. "Very well, I'm certain Osiris would be very interested in this. It is not often the Vex undertake projects of this nature." I say with certainty. "You are quite right, in fact he has already asked me to help the Guardian with this venture." says a heavily accented voice, as heavy steps can be heard approaching. There standing at the entrance of the room is a titan in silver armor, with an unmistakable plumed helmet atop his head. "Damn! We've even got Saint-14! Can I come too!" Begs Raz-22. "HAHA, why certainly, the more the merrier." The Legendary Titan chuckles. "I hope you don't mind if we get going though. Osiris says that the Guardian is on his way to Nessus as we speak." Saint-14 explains.

BEEP BEEP BEEP

Then without warning, Sparks begins to emit a shrill noise. "Ow! Watch where you're beeping!" Raz complains. "What was that!?" Zavalla asks. "That" Sparks begins ominously "was the alarm for the gate activating." With that the room goes quiet. "Well, no time to lose!" Saint-14 exclaims and runs out of the room, with Raz-22 following on his heels, leaving the Vanguard dumbstruck.

Date Unknown

Location: Nessus Unstable Centaur

Persons of interest

Serina: 2nd generation Smart AI

Captain James Cutter: Captain of the SoF

Doctor Ellen Anders: Scientific Consultant.

Ander's POV

One day. I wasn't sure how long we'd be in the portal for really. It didn't look like a slip-space rupture and the readings showed it was anything but, yet I don't think I was expecting to make it from deep space to the 'Sol System' in just one day. About an hour after entering it became rather clear that the travel was going to take a while so the crew began to go about their daily tasks. The engineers fixing the last of the battle damage from that alien world, the marines running drills with the Spartans and I went to work analyzing both the salvage from the original alien world as well as the one from the portal planet. Most fascinating of all was a sort of drone from the portal world. It was about six feet tall and made of a grayish bronze alloy of unknown make. The limbs were rather spindly and had a fan shaped head with a singular red optic in the center. It would appear to be highly resistant to energy weaponry and the kinetics we use at the UNSC. In short, it would take nothing short of a platoon of marines to take it down. That is if it didn't have a glaring weak spot in a core filled with some kind of milky white liquid, based roughly center mass. Lastly I was not expecting the drone to reactivate after we got through the portal. It just sat up and stared at me for a good five seconds. Then it began to raise its arm at me, only to notice that the end of the limb had been removed and happened to be in my hands.

SCREEEE (my best thoughts on the vex screech noise)

It began screaming and charged me before I shot it center mass with its own gun. Luckily I'd figured that one out pretty quickly. As I warily watched the twitching remains I hoped that nothing else had happened when we got here. As the ship shuddered I knew we weren't that lucky.