There is a twitch promotion allowing you to get Purple Footprints Effect inventory icon.pngPurple Footprints EffectPurple Footprints EffectBoots Modifier
Stack Size: 20
Adds purple footprints to a pair of boots.Right click this item then left click some boots to apply it.
Purple Footprints Effect inventory icon.png
, Purple Weapon Effect inventory icon.pngPurple Weapon EffectPurple Weapon EffectWeapon Effect
Stack Size: 20
Adds a Purple effect to a weapon.Right click this item then left click a weapon to apply it.
Purple Weapon Effect inventory icon.png
and Purple Portal Effect inventory icon.pngPurple Portal EffectPurple Portal EffectPortal ModificationThis character's portals use a purple effect.Right click this to set or remove your Portal effect.Purple Portal Effect inventory icon.png if you have twitch prime.

Projectile Weakness

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Projectile WeaknessCurse, Spell, AoE, Duration
Radius: 22
Mana Cost: (24 to 50)
Cast Time: 0.50 sec
Requires Level 24Curses all targets in an area, making them easier to pierce and to knock back, and increasing the damage they take from projectiles.Per 1% Quality:
Cursed enemies take 0.5% increased Damage from Projectiles
Base duration is (9-10.9) seconds
Projectiles have an additional 50% chance to Pierce Cursed enemies
Hits on Cursed Enemies have an additional 25% chance to Knockback
Cursed enemies take (25-44)% increased Damage from Projectiles
(0-76)% increased Area of Effect
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Projectile Weakness skill icon.pngProjectile Weakness inventory icon.png
Acquisition
Level: 24

Projectile Weakness skill screenshot.jpg

This wicked curse alters the very flesh of those afflicted, turning their armor and hide to mere paper. Any projectiles striking a cursed target have a high chance of piercing it, boring straight through to hit additional enemies standing behind. Foes under the Projectile Weakness curse will find themselves frustrated trying to reach the archer, since every volley has a good chance of causing a knockback. A Ranger trained in the curse of Projectile Weakness will be counted amongst the most feared combatants on the battlefield.

Description on the official Path of Exile website [1]

Projectile Weakness is a spell that curses all targets in an area, making them easier to pierce and to knock back. Additionally affected targets take increased damage from projectiles.

Skill Functions and Interactions

  • Cursed Enemies take #% increased Damage from Projectiles: because this modifier is an increase to the target's damage taken, it is multiplicative with players damage dealt and additive with any other increased damage taken effects on the target.[2] It does not affect damage dealt by damage over time effects such as poison, ignite, or Essence Drain inventory icon.pngEssence DrainEssence DrainProjectile, Spell, Duration, Chaos
    Mana Cost: (9 to 27)
    Cast Time: 0.75 sec
    Critical Strike Chance: 5.00%
    Damage Effectiveness: 60%
    Requires Level 12Fires a projectile that applies a damage over time debuff when it hits. You are healed for a portion of the debuff damage. The debuff is spread by Contagion.Per 1% Quality:
    1% increased Chaos Damage
    Deals (21.5-809) Base Chaos Damage per second
    Regenerate 0.5% of Debuff Damage as Life
    Base duration is 3.8 seconds
    Deals (6-233) to (9-349) Chaos Damage
    Modifiers to Spell Damage apply to this skill's Damage Over Time
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    Essence Drain skill icon.png
    Essence Drain inventory icon.png
    .[3]
  • Additional Pierce and Knockback Chance: any projectile type has a higher chance to pierce (additive with other sources of piercing chance) and a chance to cause the target to be knocked away from the player who created the projectile. It does not matter what direction the projectile strikes from, knockback is always away from the player who initiated the spell or attack projectile.
  • Projectile Weakness can be turned into an aura by linking it with the Blasphemy Support inventory icon.pngBlasphemy SupportBlasphemy SupportSupport, Curse, Aura
    Icon: A
    Mana Reserved: 35%
    Can store 1 use(s)
    Cooldown Time: 0.50 sec
    Requires Level 31Per 1% Quality:
    0.5% increased Effect of Supported Curses
    Supported Curse Spells are Cast as Auras
    (0-76)% increased Area of Effect of Curse Skills
    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.
    Blasphemy Support inventory icon.png
    .
    The aura version of Projectile Weakness

Gem level progression

LevelLvl.dexterityMana
Cost
Base
Duration
increased
AoE
increased
Projectile
Damage
Exp.Total Exp.
12458249N/A25%00
22764269.14%26%118,383118,383
33071279.28%27%175,816294,199
43377299.312%28%254,061548,260
53683309.416%29%359,090907,350
63990329.520%30%498,5081,405,858
74296349.624%31%682,0572,087,915
845102359.728%32%921,7773,009,692
948109379.832%33%1,727,8794,737,571
1050113389.936%34%1,138,8775,876,448
1152117391040%35%1,368,2337,244,681
12541214010.144%36%1,638,3388,883,019
13561254210.248%37%1,956,64810,839,667
14581304310.352%38%3,655,18414,494,851
15601344410.456%39%3,017,32717,512,178
16621384510.560%40%7,793,91425,306,092
17641424610.664%41%15,206,03140,512,123
18661464710.768%42%26,185,58266,697,705
19681514810.872%43%62,755,923129,453,628
20701555010.976%44%211,877,683341,331,311
2172159511180%45%N/AN/A
2274N/A5211.184%46%N/AN/A
2376N/A5311.288%47%N/AN/A
2478N/A5411.392%48%N/AN/A
2580N/A5611.496%49%N/AN/A
2682N/A5711.5100%50%N/AN/A
2784N/A5811.6104%51%N/AN/A
2886N/A5911.7108%52%N/AN/A
2988N/A6011.8112%53%N/AN/A
3090N/A6111.9116%54%N/AN/A

Quest reward

This skill is given as quest reward for the following quests:
ClassMarauderTemplarWitchShadowRangerDuelistScion
Quest
Lost in Love
Act 3
Normal
no
no
no
no
yes
no
no

Vendor reward

This skill can be bought at the listed npc vendors after completing the following quests:
ClassMarauderTemplarWitchShadowRangerDuelistScion
Quest
Lost in Love
Act 3
Clarissa
no
no
no
yes
yes
yes
no
A Fixture of Fate
Act 3
Siosa
yes

Related helmet enchantments

The following helmet enchantments affect Projectile Weakness:

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)
EnchantmentProjectileWeaknessCurseEffect16620% increased Projectile Weakness Curse Effect
EnchantmentProjectileWeaknessCurseEffect27530% increased Projectile Weakness Curse Effect
EnchantmentProjectileWeaknessDuration16630% increased Projectile Weakness Duration
EnchantmentProjectileWeaknessDuration2_7545% increased Projectile Weakness Duration

Version history

Version Changes
2.6.0
  • Increased Area of Effect mod and its progression per level doubled.
2.0.0
  • Pierce chance is now 50% at all levels. Knockback chance is now 25% at all levels. Mana cost reduced at all levels. Area of effect increases per gem level reduced, but the base area of effect has been increased by 37.5% (from 16 to 22). Normalised the increased duration per gem level. It now grants 0.5% chance to pierce cursed enemies per 1% quality (was 0.75% per 1% quality).
1.2.0
  • No longer reduces the enemy's chance to evade projectile attacks. This ability has been moved to the new skill Poacher's Mark.
1.1.0
  • Undocumented Change: Projectile damage taken changed from "more" to "increased".
0.9.5
  • Now increases damage taken from projectiles.
0.9.2
  • Projectile Weakness has been added to the game.

References

  1. "Dexterity skills". Official Path of Exile website.
  2. Mark_GGG (April 16, 2014). "Vulnerability Quality". Official Path of Exile Forums. Retrieved April 16, 2014.
  3. Mark_GGG (July 26, 2016). "Verify confused about projectile weakness double dipping with poison.". Reddit. Retrieved January 24, 2017.