I've been thinking, how does the Exo Stranger know how to heal the Traveler? She says that she can't help you with destroying the Black Heart but why? I have a theory: The Exo Stranger might be from another time,one where the Traveler is gone and the Sol System is overrun by Vex. So she teleported to the Destiny timeline by using Vex technology to stop the Vex before they start. The Exo Stranger seems to know a lot about the Vex. Almost too much. She knows about how the Vex are "born" in the Black Garden and knows that destroying its heart will heal the Traveler. But how could she know this if she were just another Exo warrior? Also the way she teleports seems very similar to the way the Vex blink-walk; she quickly disappears and she gone. Also, the way she speaks: "No, I was not forged in Light." Tampering with the Vex technology might've changed her or with the Traveler gone, there are no more Guardians. Here saying "I was not forged in Light" is not from her being made of Darkness. It's her saying that there are no more Guardians where she's from. Also, the Descendant Vex you fight in the Vault could be from her time. The reason she can't help you destroy the Black Heart is because she doesn't want to mess up the timeline. Her intervention could save humanity but also endanger it. We must continue her fight, Guardians. We must finish what she had started. But hey, that's just a theory, a Game Theory! Thanks for reading! ( I do not own Game Theory, just thought I'd put in a little joke) Let me know what you think in the comments below and follow me on this app. Thanks for the feedback.