According to one of the various armor pieces from Curse of Osiris, a Disciple of Osiris tells about how:
If the Vex truly could time travel, surely none of us would exist.
Which is a completely reasonable idea - if you could travel through time, and your objective was to fully mechanize reality, turn every spec of matter into a radiolarian solid, and create detailed logs of every creature you come across in the meantime before you kill them, why don’t the Vex go back in time and do that earlier before the Traveler intervenes?
So, if our Guardians exist [Citation needed] and the Vex haven’t killed us all [Citation needed], then the Vex must not be able to travel through time, right?
Yet, in other areas - Vault of Glass, throughout the Osiris campaign (First mission, we see Descendant Vex, yet we can also see Vex from the future throughout the campaign as well (ignoring the simulations in the Infinite Forest because anything can happen in those.)) In the Eater of Worlds Raid Lair, we also see Precursor Vex.
So think about that for a moment. Of course, this will be difficult to explain because (you know, it’s the Vex) and we’re messing with both real-time timelines and Vex-network timelines. Do remember that time works differently within the Vex network, as it only took us a few minutes to free Failsafe in the Adventure ‘Hack the Planet,’ and yet she says she spent the last decade talking to a fellow prisoner.
Again, think about this. Eater of Worlds came out in Warmind, right? And it features Vex from the future. Yet, earlier, in Curse of Osiris, we see Descendant Vex appear on Mercury. Doing some non-existant math, I calculate that the time between CoO and the EoW would be (A LOT of minutes) That big number of minutes, multiply by ten years, equals a long-ass time for the Vex to travel through.
So, to simplify this - a long time ago (for the Vex) we see Vex from the future, yet in the (semi)present, we see Vex from the past. And yet the Vex can’t time travel? Nani?
We don’t even have to do math though! In the Vault of Glass, we see both Precursor and Descendant and present-day Vex occupy the same room (Atheon’s room.)
Another example of time travel is seen when there are hostiles left in the environment when an encounter is completed. At this time, Vex seem to take their defensive/crouched stance (lowered chassis, and bowed head) as they fizzle from the local time stream. This is indeed time travel because we do not see the Vex reappear in another room with the same amount of damage taken as they did previously (however, it is completely possible that it is teleportation, and they have been repaired, but those repairs would take a long time and require time travel because, you know, their head is shot off, and there’s a bullet of .44 Magnum in their chassis.)
So here’s the paradox - can the Vex time travel, or not? If they can, we’d all be dead. If they can’t, it raises more questions.
Where do the Vex come from? By that I mean - We can shoot a Vex, it dies, yet we’ve collectively killed billions of Vex, and will probably slay trillions more! Saint-14 alone killed, quote -
“I’ve killed enough Vex to end a war.” - Lore tab, Perfect Paradox.
And yes, he was in the Infinite Forest, so Vex can just spawn out of thin air (or code.)
But still, we’ve killed a lot of Vex, and yet they keep coming. So if they’re not time travelling - going back in time just before death to duplicate their presence in any given moment and prolong their life - then where are they coming from.
The farthest I could trace it back was to an unknown length of time ago - where Oryx, the Taken King, desired more power, and (somehow?) opened a rift in reality that let the Vex through. (What?) The Vex were confused by the Hive environment, and began to study it, not understanding what they were looking at. They manifested a Vex Mind - Quria, Blade Transform, and began studying it. At some point, a war broke out, and for hundreds of local years, the Hive and Vex were at equals - the Vex were overcome when they entered the Sword World, and the Hive lost too much power when they left it.
So that’s where they originally came from - a portal opened by Oryx? Now, obviously that portal is closed - its been a really long time since then - probably millennia. So whatever lies beyond that portal must be where the Vex got their origins.
Another question that branches off from the “can the Vex time travel” question is this: If they can’t time travel, then how are they spawning into combat zones. Its a really small question, really, but it puzzles me the most.
From what I can observe, Vex have two types of super-physical travel (I’m avoiding the term ‘metaphysical’ because that defines something that doesn’t exist. Vex sure as hell exist [Citation needed]) The first is easy enough to see - Goblins do it a lot. The first type is a short-range teleportation or warp - kinda looks like a wormhole, except it isn’t. Saving the boring science, but wormholes can teleport you through space and time, yes, but the only way to do so is if you manually opened up both sides of the wormhole - one for the location and date if your destination, and one for your point of departure. Now, maybe the Vex do use wormholes, but that would require them to have been at the destination prior to the wormhole’s activation/use, which would require time travel.
The second type of super-physical movement the Vex possess is their long-range, temporal warp. This warp is apparently only capable of moving large amounts of matter - anything from a huge-ass Gate Lord to a large group of Goblins or Harpys. This teleportation is seen as a dense, localized cloud with some electric properties, which (I’m not sure if this is because my Hunter’s an Exo, or if this happens with all races. Bungie is very accurate in their details.) causes one’s vision to appear static-y, as if they screwed up the antennae on their 1980-s TV.
That teleportation seems to be non-directional, whereas the short-range teleportation a Goblin uses (notably unlike Harpys, which can use the long-range teleport, but not the short-range) is seen taking them in various directions.
Vex Gates here are a mute point because, for the most part, we cannot see the other side, however, there are instances in Vault of Glass (and other locations, but I’m too lazy to list them) where Vex Gates have taken us through time - most notably into the past and future of wherever-the-hell-Atheon-dropped-us-at-the-end-of-those-gates. @Aaetheon , I blame you for that (JK )
There is one last question that bothers me about the Vex’ capability of time travel.
For those of you who played Destiny’s “Vanilla” campaign (“That wizard came from the moon!”) you’ll probably remember the Exo Stranger - a mysterious, hooded Exo that taught me the first lesson on becoming a Dredgen.
“A side must always be taken, Little Light. Even if it is the wrong side.”
But here’s the thing that the Exo Stranger has to do with the Vex. It is highly suspected that the Exo Stranger is Elsie Bray (My Name is Byf did a video on that a long time ago.) The story goes that Elsie got her hands on a Vex Mind core for research purposes, and received a warning from a vision within the simulation she made that something bad was coming. She coordinated with Rasputin, created the highly Vex-themed sword, Worldline Zero, hid it in the data cache in the Core Terminus, and then became an Exo - becoming the Exo Stranger.
So if the Vex can’t time travel, how did Elsie’s simulation know about the impending apocalypse? What did she see? How does Worldline Zero create its “Tesseract” ability? Why did Elsie create Worldline Zero? Will I waste your time any longer with these questions that are completely inconsequential to our lives?
That last one is simple: Yes.