History of Born in Darkness

Born in Darkness is completed by finishing the Beyond Light quest line of the same name, which unlocks Stasis abilities.

How to complete

• Finish the Beyond Light campaign; the quest is given by the Exo Stranger after you obtain No Time to Explain.
• Four parts: Part 1 unlocks the Aspect of Control quest, Part 2 gives the Duskfield Grenade, Part 3 the Coldsnap Grenade, Part 4 completes the Aspect of Destruction quest and gives class Aspects. See Born in Darkness Part 1 and the later parts.
• Tasks include using Stasis abilities against enemies on Europa, playlist activities (Strikes, Gambit, Nightfalls), defeating House of Salvation platoons, and meeting the Exo Stranger in Lost Sectors using Skeleton Keys.

Note: a Bungie forum thread titled "Born in Darkness Triumph Bugged" exists; I did not open it, so the bug is unconfirmed.