Lightbringer
Collect paracausal Feathers of Light over multiple weeks in the "Harbinger" activity.
Feathers of paracausal energy have once more manifested themselves through the reservoir. Collect them before Savathûn's Taken can.
"Feathers, paracausal in nature, born of the Traveler's Light. Whatever this new message is, I have no doubt it involves Crow." —Ghost