Black Spindle can be obtained from an alternate path in the story mission Lost to Light on the Heroic difficulty. The mission must be completed normally until the point where three Tomb Husks are required to unlock the door. At this point, instead of going through the locked Tomb Husk door, the fireteam must make their way towards the Ketch from the strike The Shadow Thief. The fireteam must accomplish this without wiping, or else the door will be locked.