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Blade Vortex

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Blade VortexSpell, AoE, Duration
Radius: 15
Mana Cost: (6 to 19)
Cast Time: 0.50 sec
Critical Strike Chance: 6.00%
Damage Effectiveness: 30%
Requires Level 12This spell creates ethereal blades which orbit in an area around you, dealing damage every 0.6 seconds to all enemies in their radius. As more blades are added, the damage becomes greater and more frequent.Per 1% Quality:
0.5% increased Area of Effect
Deals (7-123) to (10-185) Physical Damage
Base duration is 5 seconds
Can have up to 20 active spinning blades
20% more Damage with Ailments for each blade
10% increased Hit Rate for each blade
30% more Damage with Hits for each blade
+(0-4) to radius
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Blade Vortex skill icon.pngBlade Vortex inventory icon.png
Acquisition
Level: 12
Purchase Costs
Normal1x Orb of Transmutation

Blade Vortex skill screenshot.jpg

Blade Vortex (often referred to as BV) is a spell that creates an ethereal blade that spins around the caster that deals physical damage, each blade lasting for the minimum duration of 5 seconds.

Skill functions and interactions

Blade Vortex's base damage is boosted by Physical Damage, Spell Damage, Area Damage, and Damage.

Physical Damage: Because Blade Vortex deals physical damage, it can be boosted by supports and skills that are more commonly used to modify attacks, such as the Added Fire Damage SupportAdded Fire Damage SupportFire, Support
Icon: F
Mana Multiplier: 120%
Requires Level 8Supports any skill that hits enemies.Per 1% Quality:
Supported Skills deal 0.5% increased Fire Damage
Supported Skills gain (25-44)% of Physical Damage as Extra Fire DamageThis 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.
support gem and the HatredHatredAura, Spell, AoE, Cold
Radius: 36
Mana Reserved: 50%
Can store 1 use(s)
Cooldown Time: 1.20 sec
Cast Time: 1.20 sec
Requires Level 24Casts an aura that increases the cold damage of you and your allies.Per 1% Quality:
1% increased Area of Effect
You and nearby allies gain (26-36)% of Physical Damage as Extra Cold Damage
+(0-19) to radius
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Hatred skill icon.png
aura.

Spell Damage: Despite the fact that it does physical damage, Blade Vortex is a spell and not an attack. It does not utilize weapon damage in any way. Blade Vortex is one of three skills that work in this manner, the other two being Ethereal KnivesEthereal KnivesProjectile, Spell
Mana Cost: (5 to 23)
Cast Time: 0.60 sec
Critical Strike Chance: 6.00%
Projectile Speed: 1300
Fires an arc of knives in front of the caster which deals physical damage.Per 1% Quality:
1% increased Projectile Speed
Deals (4-459) to (6-688) Physical Damage
9 additional Projectiles
(0-19)% increased Projectile Speed
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Ethereal Knives skill icon.png
and BladefallBladefallSpell, AoE
Radius: 12
Mana Cost: (13 to 26)
Cast Time: 0.80 sec
Critical Strike Chance: 5.00%
Damage Effectiveness: 90%
Requires Level 28Ethereal weapons rain from the sky, dealing damage to enemies in a sequence of five volleys, each wider but less damaging than the last. Enemies can be hit multiple times where these overlap.Per 1% Quality:
0.5% increased Area of Effect
Deals (44-380) to (65-570) Physical Damage
6% less Damage per Volley
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Bladefall skill icon.png
. Its damage can be amplified by Spell Damage on items and passives from the skill tree, as well as support gems that increase spell damage.

Leech: Leech effects that apply to Spell damage and to damage types dealt by Blade Vortex (Physical by default) will work as usual. Note that leech effects which apply to attacks do not apply to Blade Vortex because it is a spell, not an attack.

Area of Effect: Increases and decreases in to Area of Effect from support gems, passives, and equipment will augment the radius in which the skill deals damage (e.g. Increased Area of Effect SupportIncreased Area of Effect SupportSupport, AoE
Icon: E
Mana Multiplier: 140%
Requires Level 38Supports any skill with an area of effect.Per 1% Quality:
Supported Skills deal 0.5% increased Area Damage
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.
, Concentrated Effect SupportConcentrated Effect SupportSupport, AoE
Icon: o
Mana Multiplier: 140%
Requires Level 18Supports any skill with an area of effect, regardless of whether that skill deals damage.Per 1% Quality:
Supported Skills deal 0.5% increased Area Damage
Supported Skills have 30% less Area of Effect
Supported Skills deal (35-54)% 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 Carcass JackCarcass Jack
Varnished Coat
Quality: +20%
Evasion: (928 to 1044)
Energy Shield: (180 to 202)
Requires Level 62, 96 Dex, 96 Int3% reduced Movement Speed (Hidden)(120-150)% increased Evasion and Energy Shield
+(50-70) to maximum Life
+(9-12)% to all Elemental Resistances
20% increased Area of Effect of Area Skills
(40-50)% increased Area Damage
Extra gore
"...The discomfort shown by the others is amusing, but none
can deny that my work has made quite the splash..."
- Maligaro's Journal
).

Cast Speed: Faster Casting SupportFaster Casting SupportSupport, Spell
Icon: f
Mana Multiplier: 120%
Requires Level 18Supports spell skills.Per 1% Quality:
Supported Skills have 0.5% increased Cast Speed
Supported Skills have (20-39)% increased Cast SpeedThis 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.
, Spell Echo SupportSpell Echo SupportSpell, Support
Icon: k
Mana Multiplier: 140%
Requires Level 38Supports spell skills, making them repeat when cast. Cannot support Vaal skills, totem skills, channelling skills, triggered skills, or skills which reserve mana.Per 1% Quality:
Supported Skills deal 0.5% increased Spell Damage
Supported Skills Repeat an additional time
Supported Skills have (51-70)% more Cast Speed
Supported Skills deal 10% less 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 Cast Speed from passives and gear will increase the rate at which blades are generated.

Duration: Increased Duration SupportIncreased Duration SupportSupport, Duration
Icon: D
Mana Multiplier: 140%
Requires Level 31Supports any skill with a duration.Per 1% Quality:
Supported Skills have 0.5% increased Skill Effect Duration
Supported Skills have (45-64)% increased Skill Effect DurationThis 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.
, Less Duration SupportLess Duration SupportSupport, Duration
Icon: d
Mana Multiplier: 120%
Requires Level 31Supports any skill that has a duration.Per 1% Quality:
Supported Skills have 0.5% reduced Skill Effect Duration
Supported Skills have (40-49)% less Skill Effect Duration
Supported Skills deal (10-19)% more 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 duration-modifying passives and equipment will affect the duration of the blades. It is possible to have multiple blades active at the same time, up to a maximum of 20 blades. Once the limit is reached, creating a new blade will simply remove the oldest existing active blade, similar to Summon Raging SpiritSummon Raging SpiritSpell, Minion, Duration, Fire
Mana Cost: (4 to 12)
Cast Time: 0.50 sec
Requires Level 4Summons a short-lived flaming skull that rushes at nearby enemies and attacks them rapidly. Enemies will not directly engage these spirits, and can pass through them.Per 1% Quality:
1% increased Minion Movement Speed
Base duration is 5 seconds
Can summon up to 20 Raging Spirits at a time
Minions gain 30% less Added Damage
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Summon Raging Spirit skill icon.png
.

Poison: As Blade Vortex deals physical damage, it can easily scale poison damage.

Visual effect: Blade vortex's visual effect does not scale with Area of effect modifiers. Instead, to give a rough indication of radius, there are several versions of the knife effect, each rotating at a different radius. The skill will always try to have one knife using the largest-radius effect that's not larger than the actual radius of the skill, but that skill results in discrete visual changes where you need to reach a certain threshold before the next wider effect can be used. The full radius is always used mechanically. [1]

Gem level progression

LevelLvl.dexterityMana
Cost
Physical
Damage
RadiusExp.Total Exp.
1123367 to 10N/A00
2153978 to 12N/A15,24915,249
31948811 to 16N/A41,51756,766
42356914 to 20N/A81,983138,749
527641017 to 251147,968286,717
631731121 to 321250,557537,274
735811226 to 391405,086942,360
838881330 to 451447,7181,390,078
941941335 to 521615,3182,005,396
10441001440 to 602834,6392,840,035
11471061446 to 6921,570,7604,410,795
12501131553 to 7921,633,9876,044,782
13531191660 to 9022,151,0308,195,812
14561251668 to 10322,812,18911,008,001
15591321778 to 11735,099,36016,107,361
16621381888 to 13339,400,73125,508,092
17641421896 to 144315,273,36640,781,458
186614619104 to 157326,286,58267,068,040
196815119113 to 170362,890,590129,958,630
207015519123 to 1854212,046,017342,004,647
217215920133 to 2004N/AN/A
2274N/A21145 to 2174N/AN/A
2376N/A21157 to 2354N/AN/A
2478N/A21170 to 2544N/AN/A
2580N/A22183 to 2755N/AN/A
2682N/A23198 to 2985N/AN/A
2784N/A23214 to 3225N/AN/A
2886N/A23232 to 3475N/AN/A
2988N/A24250 to 3755N/AN/A
3090N/A24270 to 4056N/AN/A

Calculating DPS

Blade Vortex's in-game tooltip DPS gives the average damage of one hit from one Blade Vortex instance, multiplied by casts per second. This value is misleading primarily because Blade Vortex can hit more than once over its duration, thus not cast speed must be used, but hits per second (rounds per second, spin rate), over the duration of the stacks.

Math and tables

Base spin rate of Blade Vortex is 600 ms. Blade Vortex hit more frequently with more stacks it has. As gem says: 10% increased Hit Rate for each blade. So spin time is calculated as

 \pagecolor[RGB]{15,15,15} \color[RGB]{163,141,109} Spin Time = {Base Spin Time \over (1 + Spin Time Reduction \times Stacks Count) }


 \pagecolor[RGB]{15,15,15} \color[RGB]{163,141,109} Rounds Per Second = {1 \over Spin Time} = { ( 1 + Spin Time Reduction \times Stacks Count) \over Base Spin Time}

Assuming spin rate increases for 10% for each stack, we have the following data:

Stacks Spin time, ms Rounds per second
0 600 1.667
1 545 1.833
2 500 2.000
3 462 2.167
4 429 2.333
5 400 2.500
6 375 2.667
7 353 2.833
8 333 3.000
9 316 3.167
10 300 3.333
11 286 3.500
12 273 3.667
13 261 3.833
14 250 4.000
15 240 4.167
16 231 4.333
17 222 4.500
18 214 4.667
19 207 4.833
20 200 5.000

Each stack of Blade Vortex increases hit damage with the following formula:

 \pagecolor[RGB]{15,15,15} \color[RGB]{163,141,109} Hit Damage = {Base Hit Damage \times { (1 + F \times Stacks Count ) } }

Where {\textstyle  \pagecolor[RGB]{15,15,15} \color[RGB]{163,141,109} F
    } is per-stack damage increase factor.

Then we need just multiply hits per second with hit damage.

 \pagecolor[RGB]{15,15,15} \color[RGB]{163,141,109} Damage Per Second Multiplier = {Hit Damage \times Rounds Per Second }

Assuming 30% damage increase per stack, then using base hit damage as 1, we would expect the following per-hit damage increases:

Stacks Damage per hit Damage per second multiplier
0 1.0 1.667
1 1.3 2.383
2 1.6 3.200
3 1.9 4.117
4 2.2 5.133
5 2.5 6.250
6 2.8 7.467
7 3.1 8.783
8 3.4 10.200
9 3.7 11.717
10 4.0 13.333
11 4.3 15.050
12 4.6 16.867
13 4.9 18.783
14 5.2 20.800
15 5.5 22.917
16 5.8 25.133
17 6.1 27.450
18 6.4 29.867
19 6.7 32.383
20 7.0 35.000

Finally, to obtain sustained DPS from tooltip use the following formula:

 \pagecolor[RGB]{15,15,15} \color[RGB]{163,141,109} Sustained DPS = { { Damage Per Second Multipier \times Tooltip DPS } \over Casts Per Second}

or in expanded form

 \pagecolor[RGB]{15,15,15} \color[RGB]{163,141,109} Sustained DPS = { { { ( 1 + {Per Stack Damage Increase Factor \times Stacks Count} ) \times ( 1 + {Spin Time Reduction \times Stacks Count} ) } \times Tooltip DPS} \over ( {Casts Per Second \times Base Spin Time} ) }

Quest reward

This skill is given as quest reward for the following quests:
ClassMarauderTemplarWitchShadowRangerDuelistScion
Quest
The Siren's Cadence
Act 1
no
no
no
yes
no
no
yes

Vendor reward

This skill can be bought at the listed npc vendors after completing the following quests:
ClassMarauderTemplarWitchShadowRangerDuelistScion
Quest
The Siren's Cadence
Act 1
Nessa
no
no
yes
yes
yes
no
yes
A Fixture of Fate
Act 3
Siosa
yes
Fallen from Grace
Act 6
Lilly Roth
yes

Alternate skill effects

Name Cost Description
Demonic Blade Vortex Effect
Demonic Blade Vortex EffectBlade Vortex Skin
Stack Size: 20
Your Blade Vortex becomes a black and red demonic vortex.Right click this item then left click a Blade Vortex Gem to apply it.
Shop Item Coin.png90 Replaces the standard effect on a Blade VortexBlade VortexSpell, AoE, Duration
Radius: 15
Mana Cost: (6 to 19)
Cast Time: 0.50 sec
Critical Strike Chance: 6.00%
Damage Effectiveness: 30%
Requires Level 12This spell creates ethereal blades which orbit in an area around you, dealing damage every 0.6 seconds to all enemies in their radius. As more blades are added, the damage becomes greater and more frequent.Per 1% Quality:
0.5% increased Area of Effect
Deals (7-123) to (10-185) Physical Damage
Base duration is 5 seconds
Can have up to 20 active spinning blades
20% more Damage with Ailments for each blade
10% increased Hit Rate for each blade
30% more Damage with Hits for each blade
+(0-4) to radius
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Blade Vortex skill icon.png
skill gem with a black and red demonic vortex.

Shop Item Video Icon.png Preview

Related helmet enchantments

The following helmet enchantments affect Blade Vortex:

Name For generated item/monster modifiers the minimum item/monster level respectively. Some generation types may not require this condition to be met, however item level restrictions may be raised to 80% of this value. Effect(s)
EnchantmentBladeVortexDamage16625% increased Blade Vortex Spell Damage
EnchantmentBladeVortexDamage27540% increased Blade Vortex Spell Damage
EnchantmentBladeVortexDuration16620% increased Blade Vortex Duration
EnchantmentBladeVortexDuration27530% increased Blade Vortex Duration
EnchantmentBladeVortexRadius1668% increased Blade Vortex Area of Effect
EnchantmentBladeVortexRadius27512% increased Blade Vortex Area of Effect

Version history

Version Changes
2.6.0
  • Blade Vortex's radius has increased from 14 to 15 units.
  • Blade Vortex gains 1 additional unit of radius every 5 levels.
  • No longer gain increased area of effect radius.
  • You can now only have one instance of Blade Vortex active at once.
2.5.1
  • Blade Vortex's "More Damage per Blade" modifier has been changed to apply only to spell damage instead of all damage types. This will remove a double-dipping effect that should not have been occurring.
2.5.0
  • Blade Vortex has been refactored. Instead of separate hits for each active blade, the blades now increase the frequency at which all enemies in the radius take damage, and the amount of damage they take. The skill now has a base hit frequency of 600ms and has 10% increased hit rate per active blade. Its damage has been reduced by 30% at all levels and it deals 30% more damage per active blade.
2.4.0
  • Blade Vortex now has a stack limit of 20 (down from 50). It now deals 63% more damage at level 20.
2.2.0
  • The frequency with which Blade Vortex's can repeatedly hit the same enemy has been halved, but its damage and damage effectiveness have been doubled.
2.1.1b
  • Extra Gore now doesn't trigger every time Blade Vortex hits.
  • Fixed a bug where some of the visual effects on Blade Vortex weren't being updated when swapping in and out support gems which modified the area of effect.
  • Fixed a bug where some of the effects of Blade Vortex weren't finishing their animations smoothly.
2.1.0
  • Added to the game.

References

  1. Mark_GGG (January 14, 2016). "Blade Vortex quality not working/applying.". Official Path of Exile Forums. Retrieved January 16, 2016.