[b]tl;dr at the bottom[/b] If you're like me and you've finished all the adventures, you'll be familiar with the Io adventure missions involving two taken bosses called the [b]Tongue[/b] and (I think) the [b]Eye of Quria.[/b] This name won't mean anything to you if you haven't read the Books of Sorrow (like you should), but it is a very important name. For those of you unaware, Quria is the first vex to come to our universe, when Crota ripped open a hole between dimensions. She is described as a mind of better thought. Now, let's hold on a second - what's a synonym of better? Superior. The superior mind. Maybe, a vex equivalent of Oryx. That might be why she can use taken powers, or that could be a result of her understanding the sword logic, but that's for another lore topic. Also important to note is that all vex are one mind, as you probably know. So it's safe to assume that "the vex" is a [b]singular term[/b], not plural. If Quria is a superior mind, then I believe that Quria [i]is[/i] the vex as a singular term. [b]Quria is the mind.[/b] So. The superior mind has been foreshadowed, and could be the sole vex mind. So what? Well, we know that an Osiris dlc is on the horizon, and Osiris spent his time with the vex. Maybe, this dlc's raid boss is Quria. It's as valid a theory as any, especially with all the foreshadowing in these adventures (important note: Rasputin also has an adventure, so we know these foreshadowings [i]are[/i] for the dlc.) [b]So, as a conclusion and a tl;dr:[/b] Quria is coming to town, probably in a raid. We will almost certainly kill her. No more vex, if I'm right. Alternatively, the vex will be rendered weak, aimless, and pitiful, like the taken during Rise of Iron. Thanks for reading, and I'll appreciate any additional insight, either supporting or conflicting. [b]Here's a source for all your Quriosities:[/b] http://db.destinytracker.com/d1/grimoire/enemies/books-of-sorrow Edit: emboldened tl;dr stuff and key details.