Quintessence upgrades are what your containment runs pay for. The resource comes from containing anomalies and it goes into three things — your supernatural resistance, your abilities and your tactical gear — and all three are applied to the husk body you are wearing, at the ship base Hestia.
More context
The loop is containment first and upgrade second, in that order, every time.
On this page
Where Quintessence comes from
Containment is the only source. The resource is obtained after you contain an anomaly, which makes the dependency absolute: no anomaly contained, no Quintessence, whatever else the run produced.
That is worth being blunt about, because it changes what a good run looks like. Looting a site well and containing an anomaly are different scores, and only one of them opens the upgrade menu. A run where the squad came back with a full pack and nothing contained is a run that has to be repeated before it has paid for anything.
If you want the containment side of this written out — the squad shape, the detection loadout, the order of operations inside the zone — it is in the how to contain anomalies guide.
What quintessence upgrades pay for
Quintessence is spent on three targets:
Supernatural resistance
How your body handles what is on the other side of a portal.
Abilities
What the Operator can do that is not covered by a weapon.
Tactical gear
The equipment you take out with you.
The thing to understand about all three is that the body being upgraded is the husk. An investment here is an investment in a specific husk body rather than in a generic character sheet, so your upgrade decisions and your husk decisions are the same decision. Which husk you are going to be wearing for a run determines whether the resource you spent on it was well spent.
That coupling is why managing husks matters alongside gathering resources. A run that fills your upgrade budget but leaves you managing badly will not feel like progress. The husk system guide covers how many bodies you have, which of them the AI is running, and how to point the resource at one that matters.
Where you spend it
Upgrades are performed aboard Hestia, the icebreaker that serves as your base of operations. It is not something you can do in the field, which is what gives the return-to-ship leg of the loop its weight — the resource is only useful once you are back.
From Hestia you:
- Customize your H.U.S.K.
- Modify your gear and body
- Customize your cabin
- Get briefed on the main deck before the next anomaly hunt
The briefing is the part that closes the loop rather than opening a menu: Hestia is where the run you just finished gets turned into the run you are about to start.
The loop around it
The cycle the resource sits in is short and entirely deliberate:
Deploy to the island
With a husk and provisions you chose in advance.
Contain an anomaly.
This is the step that produces anything worth upgrading.
Return to Hestia
With the Quintessence and whatever else you cleared out of the site.
Spend the Quintessence
On resistance, abilities and tactical gear for the husk you are building.
Modify gear and body
With what you scavenged, alongside the Quintessence spend.
Take the briefing on the main deck
And go back out.
Steps one to three are the run, steps four to six are the ship, and the only step that grows your power is step two. Everything else moves the resource around.
The wider base loop around Hestia also covers recruiting crew, upgrading quarters, crafting gear and managing supplies. Those fuller base-management features belong to the complete game beyond the Prologue, so the island slice you are playing centres on the anomaly hunt, the modification bench and the briefing.