Murk buys permanent progress
Murk is spent at the Small Jar Bazaar on relics, which are permanent. That makes it one of the few currencies in the game where spending directly improves your account rather than just one run.
Treat Murk as a lever on long-term strength, not pocket change to ignore.
Spend toward slots you can fill
Because relics are colour-gated, the best purchase is one that fits a Nightfarer you actually play. Buying a strong relic nobody can equip is the classic waste.
Check your vessels first, then buy into the colours you can use.
Now versus later
Saving makes sense when the current options do not help you. Hoarding out of habit does not, because unused Murk is just unrealised progress.
The test is simple. If something in stock would improve your current loadout, buy it.
Earning it consistently
Expeditions feed Murk whether they succeed or fail, which means attempting harder content is rarely a loss even if you do not finish it.
Volume helps. Regular attempts, even partial ones, build your pool faster than careful saves you rarely attempt.
Revisit after big changes
When your relic pool shifts, re-check what is worth buying. A purchase that looked pointless last week may now complete a combination you did not have before.
Spend Murk where it counts
Murk buys the relic cases at the roundtable, and the best value is cases that can roll class-specific relics for your main Nightfarer. Skip Murk purchases you could earn in-run.
It accrues either way
You collect Murk from every expedition, win or lose, so attempting harder content is never wasted. Bank it toward the relic pool you actually plan to use.