Cavern: the end of each incursion
What the Cavern is, why it never falls behind, and why it is the only source of the Rupture Reagent.
reviewed 8 August 2026
What it is
The Cavern closes each incursion. Inside it the level is the game's maximum level and the content self-scales to your account, so it never falls behind. It is the only source of the Rupture Reagent.
How I do it
Before you startAn incursion in progress the Cavern is the end point of the incursion map; with no incursion open there is no Cavern.requiredParty assembled the 6 esvas enter as they are; inside the Cavern the level is the game's ceiling.required
How to reach the Cavern and what to decide before entering:
- Take the incursion to the Cavernthe Cavern is the end point of the incursion map.in gameIncursion Map → Cavern
- Assemble the party before enteringthe 6 esvas enter as they are; the content adjusts to your account, not the other way round.in gameCollection → party
- Choose the tierthere are four difficulty tiers and the choice is made at the entrance.in gameCavern → tier selection
- Enter and count the day's entrythe entry is individual and daily; once used, the Cavern closes until the next day.how often1 per day, per person
What I get — and what it costs
What I get
Rupture Reagentthe apparatus that unlocks the ruptured form in combat; the Cavern is its only source.one entry per day, per person: the tier you pick is the tier of the day, and there is no second attempt on the same day.
What it costs
1 per day, per personthe entry is daily and individual.Self-scalingthe Cavern follows your account: gaining levels does not make it trivial.Single sourcethe Rupture Reagent comes from nowhere else — the raid does not give it.