Preserved Fog Relic

Is Preserved Fog good in Slay the Spire 2?

In Slay the Spire 2, Preserved Fog is an ancient relic you can pick up on your climb. Its effect: Upon pickup, remove cards from your Deck. Add Folly to your Deck. Performance-wise it’s a steady, unspectacular pick rated C tier overall.

Over 184 tracked runs the win rate of decks holding it sits at 50.5%, 36.7% ahead of the 13.8% all-run baseline. It sees lighter play, carried in only 0.9% of runs. It does its best work in the hands of the Regent, who post a 66.7% win rate with it. Within Regent runs specifically, it’s carried 0.8% of the time.

Its standout card pairing is Falling Star, which lifts the relic’s win rate by +19.0% when both are in play. It also works nicely with Bloodletting, good for a +17.9% win-rate change. It typically enters the deck near floor 33. As an ancient relic, how often it’s offered depends on its rarity tier.

Of the runs that carried it, 93 ended in victory while 91 fell to a defeat. Its most common run-ender is Test Subject Boss, finishing 12.5% of the runs it appears in. See the best cards, class split, and threats below for the full read on whether Preserved Fog is worth grabbing.

Pick or Skip: Preserved Fog

Across 184 offers Preserved Fog has a 100.0% pick rate; the 183 runs that took it and 0 that left it are still below the sample floor, so no win rate is shown.

Taken 184 times out of 184 offers.

A win rate is only shown once that side clears the sample floor. Below it you get the run counts and nothing else — a 0% here would be a reporting artefact, not a result.

Pick rate when offered counts offers, not runs: out of every time the game put this in front of a player, how often it was taken. It is not the same number as the share of runs that end up containing it.

Pick lift is the sample-adjusted gap between runs that took the option and runs that passed on it. It is the fair way to rank choices, because raw win rates put the smallest samples on top.

Best Cards with Preserved Fog

The cards that gain the most from carrying Preserved Fog are Falling Star (+19.0%), Bloodletting (+17.9%), and Battle Trance (+17.9%), each shown with its win-rate swing.

Falling Star+19.0%23 runsBloodletting+17.9%19 runsBattle Trance+17.9%19 runsPommel Strike+17.6%22 runsGlow+16.1%15 runsAdrenaline+16.1%15 runs

Based on small co-occurring samples — treat these as early signals, not final verdicts.

Preserved Fog Win Rate by Class

Of the 5 classes that carry Preserved Fog, it performs best with Regent (66.7%), Ironclad (57.9%), and Silent (54.2%).

The Regent66.7%27 runsThe Ironclad57.9%38 runsThe Silent54.2%48 runsThe Necrobinder48.3%29 runsThe Defect30.0%40 runs

Preserved Fog Details

Carried in 0.9% of runs, Preserved Fog is an ancient relic typically acquired near floor 33.

Upon pickup, remove cards from your Deck. Add Folly to your Deck.

What Ends Runs with Preserved Fog

Runs carrying Preserved Fog end most often against Test Subject Boss (12.5%), Queen Boss (10.9%), and Aeonglass Boss (10.3%) — the share of its runs each accounts for is shown.

• Test Subject Boss12.5% of runs
• Queen Boss10.9% of runs
• Aeonglass Boss10.3% of runs
• Mecha Knight Elite4.3% of runs
• Knights Elite2.7% of runs

See Also

Keep exploring Slay the Spire 2 tier lists and stats below.