Farming plan

Piercing Step

Confidence

Direct sources

Uranus / Desdemona (Caches)CachesRot. B4.51%22.2 expected runs · 50 runs for 90%Uranus / Prospero (Caches)CachesRot. B4.51%22.2 expected runs · 50 runs for 90%Uranus / Setebos (Caches)CachesRot. B4.51%22.2 expected runs · 50 runs for 90%Duviri / Endless: Tier 1Normal0.67%149.3 expected runs · 343 runs for 90%Duviri / Endless: Tier 3Normal0.67%149.3 expected runs · 343 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

Uranus/Desdemona (Caches), Rotation B Rare 4.51 %

Uranus/Prospero (Caches), Rotation B Rare 4.51 %

Uranus/Setebos (Caches), Rotation B Rare 4.51 %

Drekar Heavy Gunner Uncommon 0.34 %

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.