WarframeAlchemyLab ES
Shotgun Riven Mod

Farming plan

Shotgun Riven Mod

Arsenal: Shotgun Riven Mod
Dropped by
Enter Nihil's Oubliette, Rotation C Rare 8 %
The Descendia: Uncommon Rewards (Steel Path) Rare 7.14 %
Sorties Rare 2.2 %
Chance of getting it by number of runs
0% 25% 50% 75% 100% 8 15 23 30 38 9 runs · 50% 9 runs · 50% 28 runs · 90% 28 runs · 90%

Each run has a 8% chance. The curve is 1−(1−p)ⁿ: there is never a guarantee, only growing confidence.