Use Pressure-Locked Delve Caches to address a specific shortage of Delve materials.
PC / Global live service
WHERE & HOW TO FARM
Where to farm
Heavy Pressurized Chests encountered in Delves; exchange caches with the Geodian merchant.
Heavy Pressurized Chests in Delves can provide Pressure-Locked Delve Caches, which can be exchanged for Delve materials through the Geodian merchant. Treat this as a conversion route for a known shortage rather than a reason to open every chest blindly: identify the module or craft you are funding, collect caches during ordinary Delve progression, then trade for the needed material. The cache source and exchange choice are distinct from Shadowy Soul Vault weekly rewards, so do not confuse a chest run with the six-vault soul limit.
Delve access and a build able to complete floors containing heavy chests.
Inventory room for caches and materials.
A specific Delve crafting or module target.
Access to the Geodian merchant for the exchange.
Identify the Delve material needed for a particular module or crafting target.
Enter Delves and complete floor objectives while watching for Heavy Pressurized Chests.
Open eligible heavy chests and collect any Pressure-Locked Delve Caches they provide.
Continue normal progression only while the depth remains manageable.
Visit the Geodian merchant and inspect the available cache exchange options.
Trade caches for the material that directly fills your shortage.
Use the material on the planned module or craft and verify the target is funded.
Repeat chest collection and exchange only if that same target still needs resources.
Farming tips
Choose the exchange after identifying the recipe or module, since the useful material depends on your current shortage.
Heavy chests and Shadowy Soul Vaults are different targets with different reward rules.
Repeat, collect and use
Repeatable collection and exchange when caches are obtained; the cache source is not a guaranteed drop from every heavy chest.
Common mistakes
Opening vaults for cache rewards: look for Heavy Pressurized Chests for this route.
Exchanging before choosing a target: match the trade to a specific material shortage.
Assuming every heavy chest yields a cache: continue Delve progression and treat cache drops as variable.
When to stop or switch
Stop when the desired module or crafting target is funded; switch to the actual Delve activity or another material source instead of stockpiling unnecessary exchanges.
