Sai Relic

Is Sai good in Slay the Spire 2?

In Slay the Spire 2, Sai is an ancient relic you can pick up on your climb. Its effect: At the start of your turn, gain Block. Performance-wise it’s a steady, unspectacular pick rated C tier overall.

Over 151 tracked runs the win rate of decks holding it sits at 64.2%, 51.3% ahead of the 12.9% all-run baseline. It sees lighter play, carried in only 1.0% of runs. It does its best work in the hands of the Necrobinder, who post a 72.2% win rate with it. Within Necrobinder runs specifically, it’s carried 0.7% of the time.

Its standout card pairing is Adrenaline, which lifts the relic’s win rate by +22.4% when both are in play. It also works nicely with Piercing Wail, good for a +20.0% 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, 97 ended in victory while 54 fell to a defeat. Its most common run-ender is Queen Boss, finishing 9.9% of the runs it appears in. See the best cards, class split, and threats below for the full read on whether Sai is worth grabbing.

Pick or Skip: Sai

Across 152 offers Sai has a 100.0% pick rate; the 152 runs that took it and 0 that left it are still below the sample floor, so no win rate is shown.

Taken 152 times out of 152 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 Sai

The cards that gain the most from carrying Sai are Adrenaline (+22.4%), Piercing Wail (+20.0%), and Bloodletting (+13.5%), each shown with its win-rate swing.

Adrenaline+22.4%15 runsPiercing Wail+20.0%19 runsBloodletting+13.5%18 runsPhantom Blades+12.2%17 runsBackflip+12.2%17 runsUnleash+10.8%16 runs

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

Sai Win Rate by Class

Of the 5 classes that carry Sai, it performs best with Necrobinder (72.2%), Ironclad (68.0%), and Regent (66.7%).

The Necrobinder72.2%18 runsThe Ironclad68.0%25 runsThe Regent66.7%27 runsThe Silent66.0%50 runsThe Defect48.3%29 runs

Sai Details

Carried in 1.0% of runs, Sai is an ancient relic typically acquired near floor 33.

At the start of your turn, gain Block.

What Ends Runs with Sai

Runs carrying Sai end most often against Queen Boss (9.9%), Aeonglass Boss (9.3%), and Test Subject Boss (8.6%) — the share of its runs each accounts for is shown.

• Queen Boss9.9% of runs
• Aeonglass Boss9.3% of runs
• Test Subject Boss8.6% of runs
• Fabricator Normal1.3% of runs
• Mecha Knight Elite1.3% of runs

See Also

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