Do we have any clue how to get the Retrocausality sparrow? it says its source is quote "Not a Scratch" but I have no clue what that means. its the only speeder that doesnt have an eververse tag on it, so it seems that its grindable, but again, I got nothing on how we are supposed to do that. I have a feeling its Tied to the Exo Stranger, either that or its gonna be an Exotic Drop from the new Raid