New Exotic SMG and Mara Sov Cutscene | Destiny 2: The Witch Queen
Starts at 1:45
I should clarify you only get this if you have the deluxe edition, also you get an ornament for it as well but for me it didn't instantly show up so just open the inventory again if it's not there.
How to get osteo striga and start the new worm grenade launcher quest. A nice little cutscene with mara sov as well.