Farming plan

Firestorm

Confidence

Direct sources

Eris / Candiru (Caches)CachesRot. C4.51%22.2 expected runs · 50 runs for 90%Eris / Lepis (Caches)CachesRot. C4.51%22.2 expected runs · 50 runs for 90%Eris / Psoro (Caches)CachesRot. C4.51%22.2 expected runs · 50 runs for 90%Eris / Viver (Caches)CachesRot. C4.51%22.2 expected runs · 50 runs for 90%Eris / Naeglar (Caches)CachesRot. C4.51%22.2 expected runs · 50 runs for 90%Duviri / Endless: Tier 4Normal1.49%67.1 expected runs · 154 runs for 90%Duviri / Endless: Tier 6Normal1.03%97.1 expected runs · 223 runs for 90%

We assume ~2.5 min per relic opening (short fissure). Per-mission timings are labeled by source: derived from game mechanics or community-estimated.

Expected runs = 100/chance · Runs for confidence p = ⌈ln(1−p)/ln(1−chance)⌉ · In a squad of 4 opening the same relic, the chance your part shows among the reveals is 1−(1−chance)⁴.

Dropped by

Eris/Candiru (Caches), Rotation C Rare 4.51 %

Eris/Lepis (Caches), Rotation C Rare 4.51 %

Eris/Naeglar (Caches), Rotation C Rare 4.51 %

Eris/Psoro (Caches), Rotation C Rare 4.51 %

Eris/Viver (Caches), Rotation C Rare 4.51 %

Arcane Boiler Rare 0.03 %

Boiler Rare 0.03 %

Toxic Ancient Rare 0.03 %

Chance of getting it by number of runs

Each run has a 4.51% chance. The curve is 1−(1−p)ⁿ: there is never a guarantee, only growing confidence.