Reflex Skill

Is Reflex good in Slay the Spire 2?

Reflex is an uncommon Silent skill in Slay the Spire 2. In combat it resolves as: Draw cards. It’s a dependable, middle-of-the-pack option, landing at C tier in our rankings.

Across 517 recorded runs, decks running it win 30.9% of the time, comfortably clear of the 14.3% average, by 16.6%. It’s a more selective pick, turning up in just 1.9% of decks that could run it. Offer data is close to a wash — 22.3% of offers taken, 29.7% for runs that picked it against 29.1% for runs that skipped, a pick lift of just +0.7% over 417 decided runs. Silent players keep it in 8.8% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.1 times in the decks that take it.

It performs best next to Mad Science — together they post a +34.5% swing in win rate. It also has strong chemistry with the relic Chandelier, which moves its win rate by +36.1%. At 3 energy, it’s upgraded in 29.5% of runs and usually joins the deck around floor 17.

Upgraded, it gains +1 Cards, which is why so many decks invest a rest-site upgrade in it. That’s 159 wins, 355 deaths, and 3 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Test Subject Boss, which closes out 5.4% of its appearances. Read on for Reflex’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Silent run.

Pick or Skip: Reflex

Out of 2031 recorded offers Reflex is taken 22.3% of the time, and taking it is worth +0.7% in pick lift — 29.7% for runs that picked it against 29.1% for runs that skipped, across 417 decided runs.

Taken 452 times out of 2031 offers.

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.

When to Pick Up Reflex

Reflex is strongest when it joins the deck in Act 3, where runs win 70.9% across 79 runs — one of 4 recorded pickup windows.

Win rate of runs by the act Reflex entered the deck. Acts that have not reached the sample floor show their run count only.

Best Cards to Pair with Reflex

Ranked by win-rate lift, Reflex performs best alongside Mad Science (+34.5%), Adrenaline (+28.2%), and Fan of Knives (+23.1%).

Mad Science+34.5%36 runsAdrenaline+28.2%95 runsFan of Knives+23.1%55 runsPanache+23.0%18 runsSneaky+21.9%28 runsKnife Trap+21.5%55 runs

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

Reflex Win Rate by Class

Reflex is drafted only by the Silent, where it holds a 30.9% win rate across 514 runs.

The Silentappears in 8.8% of its runs (514 tracked)

Best Relics for Reflex

Reflex pairs best with the relics Chandelier (+36.1%), Sword of Jade (+35.0%), and Tingsha (+32.9%), ranked by win-rate lift.

Chandelier+36.1%17 runsSword of Jade+35.0%22 runsTingsha+32.9%34 runsIron Club+31.9%22 runsRainbow Ring+30.0%23 runsSnecko Skull+29.2%55 runs

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

Reflex Card Details

Reflex is an uncommon skill costing 3 energy; it’s upgraded in 29.5% of runs and usually picked up by floor 17.

Draw cards.

Upgrade: +1 Cards

What Ends Runs with Reflex

Reflex’s most common run-enders are Test Subject Boss (5.4%), Knowledge Demon Boss (5.0%), and Aeonglass Boss (4.6%).

• Test Subject Boss5.4% of runs
• Knowledge Demon Boss5.0% of runs
• Aeonglass Boss4.6% of runs
• Decimillipede Elite3.9% of runs
• Entomancer Elite3.1% of runs

See Also

Compare Reflex with the rest of the best Slay the Spire 2 cards, relics, and classes below.