Last spark from the ashes

"No idea. I mean, if the Vex can create one, who's to say how many other species ever figured it out. Across all of time and space? In every universe?" She shakes her head. Let's not even contemplate what it means if the Vex in one reality are aware of/synonymous with the Vex of all the others.

"It's incredibly dangerous, though. At least for intruders. The Vex use it to create weapons that can restructure reality - write the target out of it so that they never existed. And there's certainly no field that prevents violence. Anyway, these guys study the Vault and the data recovered from it. They're supposed to be experts on it- some of the best you can actually track down."