WarframeAlchemyLab ES
The Countessa Comic

Farming plan

The Countessa Comic

Arsenal: The Countessa Comic
Dropped by
Höllvania (Level 55 - 60 WF1999 Bounty), Rotation C Uncommon 14.63 %
Chance of getting it by number of runs
0% 25% 50% 75% 100% 4 8 13 17 21 5 runs · 50% 5 runs · 50% 15 runs · 90% 15 runs · 90%

Each run has a 14.63% chance. The curve is 1−(1−p)ⁿ: there is never a guarantee, only growing confidence.