WarframeAlchemyLab ES
Vortex

Farming plan

Vortex

Arsenal: Vortex
Dropped by
Neptune/Arva Vector (Caches), Rotation A Rare 8.33 %
Neptune/Brom Cluster (Caches), Rotation A Rare 8.33 %
Neptune/Enkidu Ice Drifts (Caches), Rotation A Rare 8.33 %
Neptune/Mammon's Prospect (Caches), Rotation A Rare 8.33 %
Neptune/Nu-Gua Mines (Caches), Rotation A Rare 8.33 %
Neptune/Sovereign Grasp (Caches), Rotation A Rare 8.33 %
Pluto/Fenton's Field (Caches), Rotation A Rare 8.33 %
Pluto/Khufu Envoy (Caches), Rotation A Rare 8.33 %
Pluto/Obol Crossing (Caches), Rotation A Rare 8.33 %
Pluto/Peregrine Axis (Caches), Rotation A Rare 8.33 %
Pluto/Profit Margin (Caches), Rotation A Rare 8.33 %
Pluto/Seven Sirens (Caches), Rotation A Rare 8.33 %
Chance of getting it by number of runs
0% 25% 50% 75% 100% 7 15 22 30 37 8 runs · 50% 8 runs · 50% 27 runs · 90% 27 runs · 90%

Each run has a 8.33% chance. The curve is 1−(1−p)ⁿ: there is never a guarantee, only growing confidence.