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Caustic ArrowAttack, Projectile, AoE, Duration, Chaos, Bow
Level: (1-20)
Cost: (6-10) Mana
Attack Damage: (55-64)% of base
Effectiveness of Added Damage: (55-64)%
Projectile Speed: 3260
Radius: 20
Fires an arrow which deals chaos damage in an area on impact, and spreads caustic ground. Enemies standing on the caustic ground take chaos damage over time.Per 1% Quality:1Superior2Anomalous3Divergent0.5% increased Area of Effect1% chance to inflict Withered for 2 seconds on Hit1% of Physical Damage Converted to Chaos DamageDeals (55-64.4)% of Base Attack Damage
Base duration is 2 seconds
Deals (8.8-1927.1) Base Chaos Damage per second
60% of Physical Damage Converted to Chaos Damage
Modifiers to Projectile Damage apply to this Skill's Damage Over Time effect
+(0-6) to radius
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Caustic Arrow skill icon.pngCaustic Arrow inventory icon.png
Acquisition
Area level: 5
Vendor Prices
Normal1x Scroll of Wisdom
Vendor Offer
1x Scroll Fragment
Metadata
Item class: Active Skill Gems
Metadata ID: Metadata/Items/Gems/SkillGemPoisonArrow

Caustic Arrow skill screenshot.jpg


Caustic Arrow is a bow attack that fires an arrow dealing chaos damage and spreading caustic ground. Enemies standing within it receive a debuff that deals chaos damage over time. Caustic ground does not poison and is therefore not affected by poison-related modifiers.

Skill functions and interactions

  • Caustic Arrow will explode either at the targeted location or on the first monster or obstacle it hits.
  • Multiple projectiles: firing additional projectiles can spread caustic ground over a wider area, but the damage over time from overlapping patches of caustic ground does not stack.
  • Piercing: piercing Caustic Arrow projectiles will spread caustic ground each time they hit and will receive the chaos damage bonus any time they impact an enemy.
  • Projectile damage: passive nodes and gems (such as Slower Projectiles SupportSlower Projectiles SupportSupport, Projectile
    Icon: J
    Level: (1-20)
    Cost & Reservation Multiplier: 140%
    Requires Level 31Supports projectile skills.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills deal 0.5% increased Projectile DamageSupported Skills deal 0.75% increased Projectile Damage to nearby EnemiesProjectiles Fired by Supported Skills have 3% chance not to Pierce EnemiesSupported Skills have (20-30)% less Projectile Speed
    Supported Skills deal (20-29)% more Projectile 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.
    ) that increase projectile damage will increase both the damage on hit and the area of effect damage.
  • Concentrated Effect: Concentrated Effect SupportConcentrated 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.
    decreases the size of the AoE and increase its damage. However, due to the nature of the skill and the wording of its modifiers, the damage increase will not appear on the tooltip.[1]
  • Point Blank: Point Blank does not affect the damage from caustic ground; it only affects projectile attack damage.[2]
  • Iron Grip: The strength bonus from the Iron Grip keystone passive does not affect the damage from caustic ground because it is not considered an attack nor is it based on physical damage. The increased projectile damage portion of the Iron Grip SupportIron Grip SupportProjectile, Physical, Support
    Icon: i
    Level: (1-20)
    Cost & Reservation Multiplier: 120%
    Requires Level 18Supports attack skills that fire projectiles, making the increase to physical melee damage from strength also increase their physical projectile damage.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills deal 0.5% increased Projectile DamageSupported Skills have 0.5% reduced Attack Speed
    Supported Skills deal 2% increased Damage
    Supported Skills have 0.5% increased Projectile Speed
    Strength's Damage bonus applies to Projectile Attack Damage as well for Supported Skills
    Supported Skills deal (0-38)% increased Projectile 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.
    will increase the damage from caustic ground, but the strength bonus the support gem shares with the keystone will not apply.
  • Accuracy: The projectile attack is subject to accuracy and can miss. However, the explosion will spread caustic ground and do damage regardless of whether the projectile attack hits or misses. Piercing Caustic Arrow will not spread caustic ground if it misses.
  • Duration: modifiers to duration will affect the duration of the caustic ground.
  • Culling strike: The increased damage from Culling Strike SupportCulling Strike SupportSupport
    Icon: X
    Level: (1-20)
    Cost & Reservation Multiplier: 110%
    Requires Level 18Supports any skill that hits enemies. If enemies are left below 10% of maximum life after being hit by these skills, they will be killed.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills have 0.5% increased Attack Speed
    Supported Skills have 0.5% increased Cast Speed
    Supported Skills deal 3% increased Damage with Hits against Enemies that are on Low LifeRecover 0.1% of Life when Supported Skills Cull an Enemy
    Kill Enemies that have 10% Life or lower when Hit by Supported Skills
    Supported Skills deal (0-38)% increased 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.
    applies to the damage from caustic ground, but the caustic ground will not kill enemies instantly when they have less than 10% life.
  • Curses: Sniper's MarkSniper's MarkSpell, Duration, Curse, Mark
    Level: (1-20)
    Cost: (16-33) Mana
    Cast Time: 0.50 sec
    Requires Level 24Curses a single enemy, increasing the damage they take from projectiles, and making projectiles split when hitting them, to hit other targets around them. You can gain charges for your life and mana flasks by hitting the cursed enemy. You can only have one Mark at a time.Per 1% Quality:1Superior2Anomalous3DivergentCursed enemies take 0.25% increased Damage from Projectile HitsCurse Skills have 1% increased Cast SpeedHits on Cursed Enemies have an additional 2% chance to KnockbackBase duration is (6-9.8) seconds
    Projectiles which Hit Cursed Enemies Split towards (3-4) additional targets
    Cursed enemies take (16-35)% increased Damage from Projectile Hits
    You gain a Mana Flask Charge when you Hit Cursed Enemy, no more
    than once every 0.5 seconds
    You gain a Life Flask Charge when you Hit Cursed Enemy, no more
    than once every 0.5 seconds
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    Sniper's Mark skill icon.png
    requires the target to be hit. The caustic ground won't be affected by it.[3][confirmation needed because of 3.12 change] DespairDespairSpell, AoE, Duration, Chaos, Curse, Hex
    Level: (1-20)
    Cost: (16-33) Mana
    Cast Time: 0.50 sec
    Radius: 22
    Requires Level 24Curses all targets in an area, lowering their chaos resistance and increasing damage over time they take. All hits will deal added chaos damage to the cursed enemies.Per 1% Quality:1Superior2Anomalous3DivergentCursed enemies take 0.5% increased Damage from Damage Over Time effects0.5% increased Effect of CurseSpell Hits have 0.5% chance to Hinder Cursed Enemies with 30% reduced Movement Speed for 4 secondsBase duration is (9-10.9) seconds
    Cursed enemies have -(20-29)% to Chaos Resistance
    Cursed enemies take (15-25)% increased Damage from Damage Over Time effects
    Adds (9-46) to (12-57) Chaos Damage to Hits against Cursed Enemies
    Curse gains 10 Doom per second if you Cast this Spell yourself
    +(0-10) to radius
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    Despair skill icon.png
    does affect the caustic ground.

Gem level progression

LevelRequired LevelRequired DexterityMana
Cost
Damage
Effectiveness
Attack
Damage
Chaos
Damage
per sec
RadiusExp.Total Exp.
110655%55%8.8N/A00
220655%55.5%10.1N/A7070
3416656%56%13.11308378
4722656%56.5%18.4115541932
51131757%57%27.8166678599
61641757%57.5%4422604734646
72050758%58%61.924972584371
82458758%58.5%85.4295714180085
92867859%59%116.23169595349680
103275859%59.5%156.33283759633439
113683860%59.9%208.534539961087435
124092860%60.4%275.937031281790563
1344100961%60.9%362.7410612232851786
1448109961%61.4%474.1420658704917656
1552117962%61.9%616.9425071107424766
1656125962%62.4%799.35579893613223702
17601341063%62.9%1031.851508391928307621
18641421063%63.4%1327.652779273556100356
19671481064%63.9%1600.864386973999970095
20701551064%64.4%1927.16242081556342051651
21721591165%64.9%2179.26N/AN/A
2274N/A1165%65.4%2462.77N/AN/A
2376N/A1166%65.9%2781.57N/AN/A
2478N/A1166%66.4%3139.97N/AN/A
2580N/A1267%66.9%3542.68N/AN/A
2682N/A1267%67.4%39958N/AN/A
2784N/A1268%67.9%4503.18N/AN/A
2886N/A1268%68.4%5073.49N/AN/A
2988N/A1369%68.9%5713.49N/AN/A
3090N/A1369%69.4%6431.69N/AN/A
3191N/A1370%69.8%6822.89N/AN/A
3292N/A1370%70.3%7237.110N/AN/A
3393N/A1471%70.8%7675.810N/AN/A
3494N/A1471%71.3%8140.310N/AN/A
3595N/A1472%71.8%8632.211N/AN/A
3696N/A1472%72.3%9152.911N/AN/A
3797N/A1573%72.8%9704.111N/AN/A
3898N/A1573%73.3%10287.712N/AN/A
3999N/A1574%73.8%10905.412N/AN/A
40100N/A1574%74.3%11559.312N/AN/A

Item acquisition
Questionmark.png

Upgrade paths

This item can be acquired through the following upgrade paths or vendor recipes:

AmountIngredientGeneral
Notes
Type
3The Bitter BlossomThe Bitter Blossom3Level 21 Chaos Gem
Quality: +23%
Corrupted
The pain you feel is of no consequence, it is evolution, to be made whole within something greater.
random corrupted superior level 21 Chaos gem with 23% qualityAutomatic
8Dying AnguishDying Anguish8Level 19 Gem
Alternative 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 qualityAutomatic
1Gemcutter's IncubatorGemcutter's IncubatorAdds an incubated Quality Gem item to an equippable item
Item drops after killing # 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.
random superior gemAutomatic
6The FoxThe 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 gemAutomatic
3Gemcutter's PromiseGemcutter's Promise3Superior Gem
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% qualityAutomatic
1The VoidThe Void1Reach into the Void and claim your prize.random divination card set exchangeAutomatic

Quest reward

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

Class →WitchShadowRangerDuelistMarauderTemplarScion
Quest ↓
Enemy at the Gate
Act 1

Vendor reward

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

Class →WitchShadowRangerDuelistMarauderTemplarScion
Quest ↓
Enemy at the Gate
Act 1
Nessa
A Fixture of Fate
Act 3
Siosa
Fallen from Grace
Act 6
Lilly Roth

Related helmet enchantments

The following helmet enchantments affect Caustic Arrow.

NameFor 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.StatsSpawn Weighting
Enchantment Caustic Arrow Damage 16625% increased Caustic Arrow Damagehelmet 75
default 0
Enchantment Caustic Arrow Damage 27540% increased Caustic Arrow Damagehelmet 75
default 0
Enchantment Caustic Arrow Duration 16620% increased Caustic Arrow Durationhelmet 75
default 0
Enchantment Caustic Arrow Duration 27530% increased Caustic Arrow Durationhelmet 75
default 0
Enchantment Caustic Arrow Area Of Effect 16616% increased Caustic Arrow Area of Effecthelmet 75
default 0
Enchantment Caustic Arrow Area Of Effect 27524% increased Caustic Arrow Area of Effecthelmet 75
default 0
Enchantment Caustic Arrow Wither On Hit 166Caustic Arrow has 14% chance to inflict Withered on Hit for 2 seconds base Durationhelmet 75
default 0
Enchantment Caustic Arrow Wither On Hit 275Caustic Arrow has 20% chance to inflict Withered on Hit for 2 seconds base Durationhelmet 75
default 0

Alternate skill effects

Caustic Arrow has the following alternate skill effects:

ItemEffect(s)
Celestial Caustic Arrow EffectCelestial Caustic Arrow EffectSkill Gem EffectYour Caustic Arrow becomes a Celestial Effect.Your Caustic Arrow becomes a Celestial Effect.
Tentacle Caustic Arrow EffectTentacle Caustic Arrow EffectSkill Gem EffectYour Caustic Arrow becomes an area of ethereal purple tentacles.Your Caustic Arrow becomes an area of ethereal purple tentacles.

Version history

Version Changes
3.12.4d
  • Fixed an issue which prevented the quality effect on Anomalous Caustic Arrow from working.
3.12.0
  • Now has alternative quality:
Anomalous 1% chance to inflict Withered on Hit (per 1% quality)
Divergent 1% of Physical Damage Converted to Chaos Damage (per 1% quality)
3.9.0
  • Now deals 8.8 base Chaos Damage per second at gem level 1 (from 7), up to 1927.1 at gem level 20 (from 1714.8).
  • Now gains additional radius as the gem levels, up to +6 at gem level 20 (from +3).
3.6.0
  • Caustic Arrow's hit now deals 30% less damage against players (previously had no penalty).
3.0.0
  • Caustic Arrow's damage over time grows more quickly as it levels, up to 765 base Chaos damage per second at gem level 20 (up from 550.3). It is also now modified by projectile damage modifiers.
2.6.0
  • Caustic Arrow gains 1 additional unit of radius every 5 levels.
  • No longer gain increased area of effect radius.
2.1.0
  • Poison Arrow has been renamed to Caustic Arrow as part of the poison changes. The damage of this skill has been increased by around 37% at level 1, but reduced by around 42% by level 20. This reduction is more than compensated for by supporting the skill with the new supports. Caustic Arrow's mana costs have been increased, from 5 to 8 at level one, and from 13 to 16 at level 20.
2.0.0
  • Reduced the mana cost across all levels.
  • Now grants 0.5% increased area of effect radius per 1% of quality (was 1% per 1% quality).
  • Damage increased by approximately 26% at gem level 20.
1.3.0
  • Poison Arrow can now damage totems.
1.1.2
  • Damage has been increased by 8% at level 1, scaling up to an increase of 75% at level 15 of the gem.
1.0.6
  • Poison Arrow's damage has been increased at higher levels. It now does roughly 35% more damage at gem level 15.
1.0.3
  • Damage progression has been increased. It is now around 15% better at level 15 than it was in 1.0.2.
1.0.2
  • Early levels of Poison Arrow have had their damage reduced by around 35%.
0.9.13
  • It now starts off around 85% stronger at level 1 and is about 1% weaker at level 15.
0.9.12
  • Rebalanced its mana cost progression to reflect the fact that it does damage
    in a comparable way to Spells.
0.9.9
  • The size of the Poison Arrow clouds now scale with their Area of Effect radius properly.
0.9.7
  • Improved the effects of Poison Arrow.
0.9.5g
  • Fixed a bug where the Poison Arrow cloud would appear where you clicked
    even if the arrow was stopped before then by a wall.
0.9.5
  • Fixed Poison Arrow so that damage from the degeneration is scaled properly for PvP.
0.9.4
  • Increased the damage.
0.9.2
  • Poison Arrow does more damage at higher levels than before.
0.8.7
  • Poison Arrow does additional chaos damage on the actual arrow itself now, in addition to the cloud damage.
0.8.5
  • Added new skill prototype: "Poison Arrow" (Fires an arrow which explodes in a cloud of poison. Enemies who enter the cloud are poisoned for a short time, taking chaos damage)

References

  1. Daniel_GGG (3 December 2013 14:05). "Bug: Poison Arrow Skill not working with Concentrated Effect Support Gem". Path of Exile Forum. Retrieved December 18, 2013‎.
  2. Daniel_GGG (January 5, 2014 12:10). "Point blank and poison arrow". Path of Exile Forum. Retrieved May 13, 2014‎.
  3. Mark_GGG (August, 2016). "Verify confused about projectile weakness double dipping with poison.". Path of Exile subreddit. Retrieved December 16, 2016.
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