Luna's Calling

Luna's Calling is a Shadowkeep questline unlocked after the campaign, from Eris Morn in the Sanctuary on the Moon. Its five weekly Memory quests are Memory of Sai Mota, Vell Tarlowe, Toland the Shattered, Omar Agah and Eriana-3, retrieving mementos of her old fireteam so the Nightmares stop haunting her. Completing Memory of Sai Mota unlocks the Exotic Deathbringer rocket launcher.