Destiny 2: Exotic engram drop in Nightfall-Strange Terrain
Destiny 2: Shadowkeep
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Destiny 2: Season 8
This clip shows an exotic engram dropping for Helm of Saint-14 after defeating Kvada Ur-Nokru at the Nightfall strike Strange Terrain in the Hellas Basin on Mars.
Reference
Bungie. (2017). Destiny 2 (Version: Update 2.6.0.4). [Xbox One]. Bellevue, WA: Bungie, Inc.