Flanking Skill

Is Flanking good in Slay the Spire 2?

Flanking is an uncommon Silent skill in Slay the Spire 2. In combat it resolves as: The enemy takes double attack damage from other players this turn. It ranks among the strongest cards its class can draft right now, earning a spot at B tier in our Slay the Spire 2 card tier list.

Across 151 recorded runs, decks running it win 49.7% of the time, comfortably clear of the 13.8% average, by 35.8%. It’s a more selective pick, turning up in just 0.7% of decks that could run it. Offer data backs the pick — taken 28.8% of the time it is shown, with 50.8% for runs that took it against 37.8% for runs that did not, a +12.1% pick lift across 130 decided runs. Silent players keep it in 3.0% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.2 times in the decks that take it.

It performs best next to Speedster — together they post a +18.8% swing in win rate. It also has strong chemistry with the relic Pear, which moves its win rate by +19.4%. At 2 energy, it’s upgraded in 62.4% of runs and usually joins the deck around floor 18.

Upgraded, it gains -1 EnergyCost, which is why so many decks invest a rest-site upgrade in it. That’s 75 wins, 76 deaths, and 0 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Aeonglass Boss, which closes out 6.6% of its appearances. Read on for Flanking’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Silent run.

Pick or Skip: Flanking

Out of 504 recorded offers Flanking is taken 28.8% of the time, and taking it is worth +12.1% in pick lift — 50.8% for runs that picked it against 37.8% for runs that skipped, across 130 decided runs.

Taken 145 times out of 504 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 Flanking

Flanking is strongest when it joins the deck in Act 3, where runs win 73.7% across 19 runs — one of 3 recorded pickup windows.

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

Best Cards to Pair with Flanking

Ranked by win-rate lift, Flanking performs best alongside Speedster (+18.8%), Acrobatics (+18.4%), and Tools of the Trade (+15.6%).

Speedster+18.8%25 runsAcrobatics+18.4%34 runsTools of the Trade+15.6%16 runsMad Science+14.5%18 runsBullet Time+13.9%23 runsBackstab+13.4%28 runs

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

Flanking Win Rate by Class

Flanking is drafted only by the Silent, where it holds a 50.4% win rate across 139 runs.

The Silentappears in 3.0% of its runs (139 tracked)

Best Relics for Flanking

Flanking pairs best with the relics Pear (+19.4%), Strike Dummy (+19.4%), and Venerable Tea Set (+19.1%), ranked by win-rate lift.

Pear+19.4%16 runsStrike Dummy+19.4%16 runsVenerable Tea Set+19.1%35 runsPantograph+18.2%15 runsBronze Scales+17.8%27 runsLantern+17.6%36 runs

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

Flanking Card Details

Flanking is an uncommon skill costing 2 energy; it’s upgraded in 62.4% of runs and usually picked up by floor 18.

The enemy takes double attack damage from other players this turn.

Upgrade: -1 EnergyCost

What Ends Runs with Flanking

Flanking’s most common run-enders are Aeonglass Boss (6.6%), Decimillipede Elite (5.3%), and Queen Boss (4.6%).

• Aeonglass Boss6.6% of runs
• Decimillipede Elite5.3% of runs
• Queen Boss4.6% of runs
• Test Subject Boss4.0% of runs
• Knowledge Demon Boss3.3% of runs

See Also

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