Blade FlurryAttack, AoE, Channelling, Physical, Melee
Level: (1-20)
Cost: 4 Mana
Attack Speed: 160% of base
Attack Damage: (32-49)% of base
Radius: 14 / 17 / 19
Requires Level 28Repeatedly hit enemies in a circle in front of you while channelling, dealing damage to and around the enemy. The damage is continually boosted while channelling. You unleash an additional hit for each stage reached once the channelling ends. Requires a Dagger, Claw or One-Handed Sword.Per 1% Quality:1Superior2Anomalous3Divergent0.5% increased Attack SpeedFinal Flurry has 1% increased Area of Effect2% increased Elemental Damage while Channelling20% more Damage with Hits and Ailments for each stage
(14-75) to (20-113) Added Attack Physical Damage
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Acquisition
Drop level: 28
Vendor Offer
1x Scroll Fragment
Item class: Skill Gem

Blade Flurry is a channeling melee attack. While channeling, Blade Flurry repeatedly attacks a random enemy in front of the player, also damaging enemies nearby the original target. When released, it will unleash an extra number of attacks equal to the stage reached.

## Skill functions and interactions

• Stages: Each attack, while channeling, applies a single stage that grants 20% more damage, up to 120% more damage total at 6th stage. Each stage will also add an extra attack to the release of Blade Flurry.
• Dual wielding: The skill alternates between the main hand and the offhand for each hit.[1]
• Area of effect: Modifiers to area, such as Concentrated Effect SupportSupport, AoE
Icon: o
Level: (1-20)
Cost & Reservation Multiplier: 140%
Requires Level 18Supports any skill with an area of effect, regardless of whether that skill deals damage.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills deal 0.5% increased Area DamageSupported Skills have 0.5% less Area of EffectSupported Skills have 0.5% reduced Enemy Stun ThresholdSupported Skills have 30% less Area of Effect
Supported Skills deal (25-39)% more Area Damage
This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
and Increased Area of Effect SupportSupport, AoE
Icon: E
Level: (1-20)
Cost & Reservation Multiplier: 130%
Requires Level 38Supports any skill with an area of effect.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills deal 0.5% increased Area DamageSupported Skills have 0.5% increased Area of Effect
Supported Skills deal 1% reduced Damage
Supported Skills have 0.25% increased Area of Effect
Supported Skills have (30-49)% increased Area of EffectThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
, affect both the radius of the main hit and the radius of the explosion caused by it.
• Trigger supports: While both Cast On Critical Strike SupportCritical, Support, Spell, Trigger
Icon: &
Level: (1-20)
Requires Level 38Must support both an attack skill and a spell skill to work. The attack skill will trigger a spell when it critically strikes an enemy. Cannot support totems, traps, or mines. Vaal skills, channelling skills, and skills with a reservation cannot be triggered.Supported Attacks will Trigger a Supported Spell when you Crit an Enemy
Supported Skills deal (19-10)% less Spell Damage
You cannot Cast Supported Triggerable Spells directly
This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
and Cast while Channelling SupportSupport, Channelling, Spell, Trigger
Icon: W
Level: (1-20)
Requires Level 38Must support both a channelling skill and a non-channelling spell skill to work. The channelling skill will trigger a spell periodically while channelling. Cannot support skills used by totems, traps, or mines. Vaal skills and skills with a reservation cannot be triggered.Trigger a Supported Spell every (0.45-0.35) seconds while Channelling Supported Skills
Supported Triggered Spells deal 30% less Damage
You cannot Cast Supported Triggerable Spells directly
This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
can support Blade Flurry independently, they won't work in tandem; neither will trigger.
• Multistrike SupportAttack, Melee, Support
Icon: 3
Level: (1-20)
Cost & Reservation Multiplier: 150%
Requires Level 38Supports melee attack skills, making them repeat twice when used, targeting a random enemy each time. Cannot support Vaal skills, channelling skills or triggered skills.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills deal 0.5% increased Melee Physical DamageSupported Skills have 1% reduced Attack Speed
Supported Skills have 1% increased Area of Effect per Repeat
Supported Skills have 0.5% increased Attack Speed
Supported Skills Repeat 2 additional times
Supported Skills have (35-44)% more Melee Attack Speed
First Repeat of Supported Skills deals 22% more Damage
Second Repeat of Supported Skills deals 44% more Damage
Supported Skills deal (30-20)% less Attack Damage
This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
: Blade Flurry (and all channelled skills) cannot be supported by Multistrike.

## DPS Calculation

Blade Flurry's tooltip DPS is not accurate, because it shows Average Damage (ignoring Attack Speed) and doesn't account for stage bonus. Here is how to calculate the actual DPS:

$\color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}DamagePerSecond=Base\times 1.6\times 2\times StageMult$

where Base is the base damage given by gem level, and StageMult ranges from 1.1 to 1.85 (see table in Derivation) depending on which stage level was reached before releasing. This formula also assumes the player's return strike(s) can hit an enemy; remove the 2 in the middle to approximate what happens when the return strikes don't hit an enemy.

For example, at gem level 20, with "perfect channeling," as of patch 3.14:

$\color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}DamagePerSecond=0.45\times 1.6\times 2\times 1.85=2.664$

or 266% weapon damage per second. Note that the DPS will be slightly lower in practice because players cannot reach perfect channeling, only get very close.

Derivation of the stage multiplier [Expand]

Importantly, these assumptions are based on a theory vs practice test that indicates that Stage bonus is not applied when reaching that stage (aka, first hit doesn't get 20% more damage; second hit gets 20% more damage, third hit gets 40% more damage, and so on) while return strikes get the full stage bonus as reached (aka, one hit and one return strike means the return strike has 20% more damage, two hits and two return strikes mean the return strikes all have 40% more damage, and so on). This can be backed into based on Zrevnur's DPS test in a patch where Blade Flurry had 66.4% of base damage at level 20 and a 65% more Attack Speed multiplier:

((.664*1.65*2.2)+(.664*1.65*1.5))/1.38 = 2.9375, or 2.94x, which is approximately as much as Zrevnur's test, with some adjustment for nonperfect channeling, rounding of time-to-kill, weapon damage variance, etc.

We can begin with the most basic formulation, which is damage without channeling bonuses or return strikes. Let $\color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}b$ represent base damage multiplier and $\color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}a$ represent attack speed modifier as listed on gem description. Then,

${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}dps=b\times (1+a)}$
(1)

and we can add another copy of the same equation for the return strikes:

${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}dps=b\times (1+a)+b\times (1+a)}$
(2)

Now, we have to analyze stage bonus. We begin with the 6-stage case, where the return strikes will have the full 20% * 6 = 120% stage bonus:

${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}dps=b\times (1+a)+b\times (1+a)\times (1+1.2)}$
(3)

Then, for the build-up strikes, we have the average of strikes. We know strikes 1 through 6 will have stage bonus of n-1, as they will have the previous stage's bonus. This means that the average bonus of 0, 20, 40, 60, 80, and 100 will be 50, or, ${\textstyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}1+0.5}$. We get:

${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}dps=b\times (1+a)\times (1+0.5)+b\times (1+a)\times (1+1.2)}$
(4)

Now, as the buildup and return strikes have common factor of b(1+a), we can use distributive property to extract it in the manner of (xc + xd) = x(c+d)

${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}dps=(b\times (1+a))\times ((1+0.5)+(1+1.2))}$
(5)

Now, we know that we essentially started out with "x+x" which is more intuitively accepted as "2x" - the common base is now found in the 1s on the right side of the equation. Instead of $\color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}{{1+0.5}+{1+1.2}}$ we can average this out to represent "average buildup and return strikes' damage bonus", then have a more intuitive "2x for twice the strikes" on the outside:

{\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}{\begin{aligned}allhitsStage&=2\times {(1+0.5)+(1+1.2) \over 2}\\&=2\times {3.7 \over 2}\\&=2\times 1.85\end{aligned}}}
(6)

Finding averages for buildup strikes for 1 through 5 stages is left as an exercise for the reader (for those who can't imagine the intuitive linear graph for this, you may have to look at all sets {0}, {0, 20}, {0, 20, 40}, {0, 20, 40, 60,} and {0, 20, 40, 60, 80}) This means stage bonus can be as follows, when we remove the 2 from 6 to look at average stage bonus instead of stage bonus and twice-the-hits bonus:

${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}averageStageat6stages={(1+0.5)+(1+1.2) \over 2}}$
(9)
${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}averageStageat5stages={(1+0.4)+(1+1.0) \over 2}}$
(10)
${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}averageStageat4stages={(1+0.3)+(1+0.8) \over 2}}$
(11)
${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}averageStageat3stages={(1+0.2)+(1+0.6) \over 2}}$
(12)
${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}averageStageat2stages={(1+0.1)+(1+0.4) \over 2}}$
(13)
${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}averageStageat1stage={(1+0.0)+(1+0.2) \over 2}}$
(14)

for the following "average stage bonus when combining buildup and return strikes" table:

Stage reached upon release Average stage multiplier
1 110%
2 125%
3 140%
4 155%
5 170%
6 185%

Now, returning to 5, we can use 8 to simplify:

${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}dps=(b\times (1+a))\times 2\times (StageMultiplier)}$
(15)

where StageMultiplier selects from 9 through 14, as a replacement for 1.85 in the 6-stages example. Moreover, for all levels, the attack speed bonus is 60% more, so dps will always be:

${\displaystyle \color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}dps=b\times 1.6\times 2\times (StageMultiplier)}$
(16)

## Gem level progression

LevelDamage
Effectiveness
Attack
Damage
Physical DamageExp.Total Exp.
128422932%32%14 to 2000
231463233%32.9%16 to 24199345199345
334503534%33.8%18 to 27285815485160
437543735%34.7%21 to 31401344886504
540584036%35.6%24 to 355543791440883
642604236%36.5%26 to 394774371918320
744634437%37.4%28 to 425837862502106
846664638%38.3%30 to 467103593212465
948684839%39.2%33 to 4913555114567976
1050714940%40.1%36 to 5411388775706853
1152745141%40.9%39 to 5813682337075086
1254765342%41.8%42 to 6316383388713424
1356795543%42.7%45 to 68195664810670072
1458825744%43.6%49 to 73365518414325256
1560845945%44.5%52 to 79301732717342583
1662876045%45.4%56 to 85775999525102578
1764906246%46.3%61 to 911513819340240771
1866926447%47.2%65 to 982608382566324596
1968956648%48.1%70 to 10562620247128944843
2070986849%49%75 to 113211708088340652931
21721007050%49.9%81 to 122N/AN/A
2274N/AN/A51%50.8%87 to 130N/AN/A
2376N/AN/A52%51.7%93 to 140N/AN/A
2478N/AN/A53%52.6%100 to 150N/AN/A
2580N/AN/A53%53.5%107 to 160N/AN/A
2682N/AN/A54%54.4%114 to 172N/AN/A
2784N/AN/A55%55.3%123 to 184N/AN/A
2886N/AN/A56%56.2%131 to 197N/AN/A
2988N/AN/A57%57.1%140 to 210N/AN/A
3090N/AN/A58%57.9%150 to 224N/AN/A
3191N/AN/A58%58.4%155 to 232N/AN/A
3292N/AN/A59%58.8%160 to 240N/AN/A
3393N/AN/A59%59.3%165 to 248N/AN/A
3494N/AN/A60%59.7%171 to 256N/AN/A
3595N/AN/A60%60.2%176 to 265N/AN/A
3696N/AN/A61%60.6%182 to 273N/AN/A
3797N/AN/A61%61.1%188 to 282N/AN/A
3898N/AN/A62%61.5%194 to 292N/AN/A
3999N/AN/A62%62%201 to 301N/AN/A
40100N/AN/A62%62.4%207 to 311N/AN/A

## Item acquisition

### Recipes

Blade Flurry can be created from the following recipes:

AmountPartDescriptionMeta
8Dying Anguish8Level 19 Gem
Alternate Quality: +19%
Moribund, he gazed upon the journey taken as blood trickled down his chin. His eye closed on the city ahead that he would never call home.
Random level 19 gem with 19% alternative qualityA
1Gemcutter's IncubatorStack Size: 10Adds an incubated Quality Gem item to an equippable item
Item drops after killing {0} monsters
Quality GemRight click this item then left click an item to apply it. The Incubated item drops after killing a specific number of monsters.
Shift click to unstack.
Random superior gemA
6The Fox6Level 20 Gem"Masters of wit, strength and cunning. To survive the harsh winters, you must be like the fox."
- Ezomyte Proverb
Random level 20 gemA
3Gemcutter's Promise3Gem
Quality: +20%
"I swore to use my position to help the people. What good is power when it just accumulates on the already-powerful?" - Erasmus, Imperial Gemcutter
Random superior gem with 20% qualityA
1The Void1Reach into the Void and claim your prize.Random divination card set exchangeA

### Quest reward

This item is given as a quest reward for the following quests:

Quest ↓
Sever the Right Hand
Act 3

### Vendor reward

This item can be bought at the listed NPC vendors, after completing the following quests:

Quest ↓
A Fixture of Fate
Act 3
Siosa
Sever the Right Hand
Act 3
Clarissa
Fallen from Grace
Act 6
Lilly Roth

## Related helmet enchantments

The following helmet enchantments affect Blade Flurry.

NameLabyrinthStatsSpawn Weighting
default 0
default 0
Enchantment Blade Flurry Maximum Stage 175Eternal Labyrinth+1 to maximum Blade Flurry stageshelmet 100
default 0
Enchantment Blade Flurry Area Of Effect 166Merciless Labyrinth16% increased Blade Flurry Area of Effecthelmet 100
default 0
Enchantment Blade Flurry Area Of Effect 275Eternal Labyrinth24% increased Blade Flurry Area of Effecthelmet 100
default 0

## Alternate skill effects

Blade Flurry has the following alternate skill effects:

ItemEffect(s)

## Version history

Version Changes
3.16.0
• Blade FlurryAttack, AoE, Channelling, Physical, Melee
Level: (1-20)
Cost: 4 Mana
Attack Speed: 160% of base
Attack Damage: (32-49)% of base
Radius: 14 / 17 / 19
Requires Level 28Repeatedly hit enemies in a circle in front of you while channelling, dealing damage to and around the enemy. The damage is continually boosted while channelling. You unleash an additional hit for each stage reached once the channelling ends. Requires a Dagger, Claw or One-Handed Sword.Per 1% Quality:1Superior2Anomalous3Divergent0.5% increased Attack SpeedFinal Flurry has 1% increased Area of Effect2% increased Elemental Damage while Channelling20% more Damage with Hits and Ailments for each stage
(14-75) to (20-113) Added Attack Physical Damage
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Helmet Enchantment that granted chance to Dodge Attack Hits now grants +1 Maximum Stages.
• This affects existing items
3.15.0
• Now deals 49% of Base Damage, and has 49% Effectiveness of Added Damage at gem level 20 (previously 45%).
3.7.0
• Now deals base damage equal to, and has an added damage effectiveness of, 32% at gem level 1 (from 45%), up to 45% at gem level 20 (from 56%).
• Now adds 14 to 20 physical damage to attacks at gem level 1, up to 75 to 113 at gem level 20.
• Now has 29% larger target-acquiring radius while channelling, and 47% larger target-acquiring radius after channelling ends.
• Now has an attack speed multiplier of 160% (rather than 60% more attack speed).
2.6.0
• Damage reduced by 18% at level 1 of the gem, scaling to a 15% reduction at level 20 of the gem.
• Radius has gained 2 units on all of its ranges. (The damage area has increased from 12 to 14 units, the channelling targeting area has increased from 15 to 17 units and the release targeting area has increased from 17 to 19 units.)
• No longer gain increased area of effect radius.
2.5.0
• Blade Flurry's "More attack speed" modifier has been reduced from 65% more to 60% more attack speed at all levels. Blade Flurry's targeting range has been reduced by 16.6%, and the damage radius of slashes has been reduced by 14.2%.
2.4.2
• Added new Dexterity/Intelligence skill - Blade Flurry: Repeatedly strike at enemies in a circle in front of you while channelling, dealing damage to and around the struck enemy. The damage is continually boosted while channelling. You unleash an additional strike for each stage reached once the channelling ends. Requires a Dagger, Claw or One-Handed Sword.

## References

1. Bex (November 20, 2016). "Recently Asked Community Questions". Official Path of Exile Forums. Retrieved November 21, 2016.