Caustic Arrow

Attack, Projectile, AoE, Duration, Chaos, Bow
Level: 1–20
Cost: 6–10 Mana
Effectiveness of Added Damage: 55–64%
Projectile Speed: 3260

Requires Level 1

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.

Deals (8.8–1927.1) Base Chaos Damage per second
Base duration is 2 seconds
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

Additional Effects From Quality:
(0–10)% increased Area of Effect

Unusual Gems /3

Type	Stats	Weight
Superior	(0–10)% increased Area of Effect	50
Anomalous	(0–20)% chance to inflict Withered for 2 seconds on Hit	100
Divergent	(0–20)% of Physical Damage Converted to Chaos Damage	100

Quest /2

Act	Quest Complete	NPC	Character
1	Enemy at the Gate	Quest Reward	Ranger
1	Enemy at the Gate	Nessa	Duelist Ranger Scion Shadow

Caustic Arrow /6

A projectile attack that creates a patch of caustic ground on hit which deals chaos damage over time to affected enemies.

Name	Show Full Descriptions
Pierce Support	Allows projectiles from Caustic Arrow to travel through more enemies, creating multiple patches of caustic ground, dealing damage to more enemies simultaneously.
Lesser Multiple Projectiles Support	Increases the amount of arrows Caustic Arrow fires, allowing it to cover a larger area by creating multiple patches of caustic ground at once. At later levels, obtain the Greater Multiple Projectiles Support gem to affect enemies in a larger area.
Mirage Archer Support	When Caustic Arrow hits an enemy, an apparition is created above you that fires a copy of Caustic Arrow at enemies, at a reduced rate and with less damage.
Vicious Projectiles Support	Greatly increases both the physical damage from hits and chaos damage over time component of Caustic Arrow.
Swift Affliction Support	Decreases the duration of Caustic Arrow's ground effect, but compensates for this by increasing damage over time dealt.
Void Manipulation Support	Grants more chaos damage but lowers the elemental damage of Caustic Arrow. The Caustic ground effect only deals chaos damage, so Void Manipulation gives more damage at no drawback.

Level Effect /40

Implicit
Modifiers to Projectile Damage apply to this Skill's Damage Over Time effect skill can fire arrows [1] visual hit effect chaos is green [1] Base duration is 2 seconds 60% of Physical Damage Converted to Chaos Damage

Level	Requires Level	Dexterity	Cost	Base Damage	Deals 8.8 Base Chaos Damage per second	# to radius	Experience
1	1	10	6	55%	8.8	0	70
2	2	12	6	55.5%	10.1	0	308
3	4	16	6	56%	13.1	1	1,554
4	7	22	6	56.5%	18.4	1	6,667
5	11	31	7	57%	27.8	1	26,047
6	16	41	7	57.5%	44	2	49,725
7	20	50	7	58%	61.9	2	95,714
8	24	58	7	58.5%	85.4	2	169,595
9	28	67	8	59%	116.2	3	283,759
10	32	75	8	59.5%	156.4	3	453,996
11	36	83	8	59.9%	208.5	3	703,128
12	40	92	8	60.4%	275.9	3	1,061,223
13	44	100	9	60.9%	362.7	4	2,065,870
14	48	109	9	61.4%	474.1	4	2,507,110
15	52	117	9	61.9%	616.9	4	5,798,936
16	56	125	9	62.4%	799.3	5	15,083,919
17	60	134	10	62.9%	1031.9	5	27,792,735
18	64	142	10	63.4%	1327.6	5	43,869,739
19	67	148	10	63.9%	1600.8	6	242,081,556
20	70	155	10	64.4%	1927.1	6
21	72		11	64.9%	2179.2	6
22	74		11	65.4%	2462.7	7
23	76		11	65.9%	2781.5	7
24	78		11	66.4%	3139.9	7
25	80		12	66.9%	3542.6	8
26	82		12	67.4%	3995	8
27	84		12	67.9%	4503.1	8
28	86		12	68.4%	5073.4	9
29	88		13	68.9%	5713.5	9
30	90		13	69.4%	6431.6	9
31	91		13	69.8%	6822.8	9
32	92		13	70.3%	7237.1	10
33	93		14	70.8%	7675.8	10
34	94		14	71.3%	8140.3	10
35	95		14	71.8%	8632.2	11
36	96		14	72.3%	9152.9	11
37	97		15	72.8%	9704.2	11
38	98		15	73.3%	10287.7	12
39	99		15	73.8%	10905.4	12
40	100		15	74.3%	11559.3	12

Reference	poe.ninja, Community Wiki
Acronym	Projectile, Modifiers
BaseType	Caustic Arrow
Class	Active Skill Gems
Weapon	Bows
TargetTypes	Ground, Enemy
Type	Attack, RangedAttack, MirageArcherCanUse, Projectile, ProjectilesFromUser, Area, Duration, Trappable, Mineable, Totemable, DamageOverTime, Chaos, Triggerable
Metadata	Metadata/Items/Gems/SkillGemPoisonArrow

Caustic Arrow Monster /19 ⍟

Name	Modifiers	Spectre
Alira's Deadeye		Y
Alira's Souleye		Y
Devoted Bandit		Y
Wolfpack Ranger		Y
Plagued Bowman	Undead Fires Caustic Arrows	Y
Izioc, the Abyss	monster dropped item quantity +% [1500] monster dropped item rarity +% [2000] monster slain experience +% [100] unique boss curse effect on self +% final [-33] cannot be taunted when taunted ms [0] monster penalty against minions damage +% final vs player minions [-20] cannot be stunned for ms after stun finished [2000] cannot be stunned while stunned [1]	Y
Lord of the Bow	monster dropped item quantity +% [1500] monster dropped item rarity +% [2000] monster slain experience +% [100] Fast Attacks Extra Projectiles unique boss curse effect on self +% final [-33] cannot be taunted when taunted ms [0] cannot be stunned for ms after stun finished [2000] cannot be stunned while stunned [1]	Y
Antalie Napora	monster base type attack cast speed +% and damage -% final [33] monster dropped item rarity +% [500] unique boss curse effect on self +% final [0] Fast Attacks	Y
Silva Fearsting	monster base type attack cast speed +% and damage -% final [33] monster dropped item rarity +% [500] unique boss curse effect on self +% final [0]	Y
Corrupted Deadeye	monster no map drops [1]	Y
Eyepecker	summon totem cast speed +% [0] number of additional totems allowed [1] kill traps mines and totems on death [1]	Y
Stonebeak, Battle Fowl	cannot be taunted when taunted ms [0] unique boss curse effect on self +% final [-33] number of additional totems allowed [1] summon totem cast speed +% [0] monster dropped item quantity +% [1500] monster dropped item rarity +% [2000] monster slain experience +% [100] cannot be stunned for ms after stun finished [2000] cannot be stunned while stunned [1]	Y
Rudiarius Felix	monster base type attack cast speed +% and damage -% final [33] monster dropped item rarity +% [500] unique boss curse effect on self +% final [0] Fast Attacks mines invulnerable for duration ms [4000] traps invulnerable for duration ms [4000] kill traps mines and totems on death [1]	Y
Rudiarius Felix	Quick monster dropped item rarity +% [500] unique boss curse effect on self +% final [0] mines invulnerable for duration ms [4000] traps invulnerable for duration ms [4000]	Y
Avatar of the Huntress	Quick monster dropped item quantity +% [1500] monster dropped item rarity +% [2000] monster slain experience +% [100] unique boss curse effect on self +% final [-33] mines invulnerable for duration ms [4000] traps invulnerable for duration ms [4000] kill traps mines and totems on death [1] cannot be stunned for ms after stun finished [2000] cannot be stunned while stunned [1]	Y
Blackguard Jaeger	Fires Caustic Arrows	Y
Blighted Deadeye	Fires Caustic Arrows monster dropped item quantity +% [0] monster dropped item rarity +% [0] monster no map drops [1] monster slain experience +% [0]	Y
Clattering Experiment	monster no map drops [1]	Y
Clattering Bones	monster no map drops [1]	Y

Microtransactions /2 ⍟

Icon	Name
	Tentacle Caustic Arrow Effect Your Caustic Arrow becomes an area of ethereal purple tentacles.
	Celestial Caustic Arrow Effect Your Caustic Arrow becomes a Celestial Effect.

Labyrinth Enchantment helmet /8 ⍟

Level	Name	Mod	Weight
The Merciless Labyrinth	Enchantment Caustic Arrow Damage 1	25% increased Caustic Arrow Damage	75
The Eternal Labyrinth	Enchantment Caustic Arrow Damage 2	40% increased Caustic Arrow Damage	75
The Merciless Labyrinth	Enchantment Caustic Arrow Duration 1	20% increased Caustic Arrow Duration	75
The Eternal Labyrinth	Enchantment Caustic Arrow Duration 2	30% increased Caustic Arrow Duration	75
The Merciless Labyrinth	Enchantment Caustic Arrow Area Of Effect 1	16% increased Caustic Arrow Area of Effect	75
The Eternal Labyrinth	Enchantment Caustic Arrow Area Of Effect 2	24% increased Caustic Arrow Area of Effect	75
The Merciless Labyrinth	Enchantment Caustic Arrow Wither On Hit 1	Caustic Arrow has 14% chance to inflict Withered on Hit for 2 seconds base Duration	75
The Eternal Labyrinth	Enchantment Caustic Arrow Wither On Hit 2	Caustic Arrow has 20% chance to inflict Withered on Hit for 2 seconds base Duration	75

Supported By /108 ⍟

Active Type: Attack, RangedAttack, MirageArcherCanUse, Projectile, ProjectilesFromUser, Area, Duration, Trappable, Mineable, Totemable, DamageOverTime, Chaos, Triggerable

Support Gem	ActiveType
Added Fire Damage Support	Damage, Attack
Faster Attacks Support	Attack, ThresholdJewelRangedAttack
Greater Multiple Projectiles Support	Projectile, ThresholdJewelProjectile, ThresholdJewelRangedAttack, ProjectileNumber
Lesser Multiple Projectiles Support	Projectile, ThresholdJewelProjectile, ThresholdJewelRangedAttack, ProjectileNumber
Greater Volley Support	ProjectilesFromUser
Faster Projectiles Support	Projectile, ProjectileSpeed, ThresholdJewelProjectile, ThresholdJewelRangedAttack
Added Cold Damage Support	Attack, Damage
Additional Accuracy Support	Attack, ThresholdJewelRangedAttack
Increased Area of Effect Support	Area, MinionsCanExplode, ThresholdJewelArea
Added Lightning Damage Support	Attack, Damage
Increased Critical Strikes Support	Damage, Attack
Increased Critical Damage Support	Damage, Attack
Knockback Support	Damage, Attack
Life Leech Support	Damage, Attack
Mana Leech Support	Attack
Added Chaos Damage Support	Damage, Attack
Stun Support	Damage, Attack
Pierce Support	Projectile, ThresholdJewelProjectile, ThresholdJewelRangedAttack
Trap Support	Trappable
Item Rarity Support	Damage, Attack, DamageOverTime, KillNoDamageModifiers
Concentrated Effect Support	Area, MinionsCanExplode, ThresholdJewelArea
Increased Duration Support	Duration, ThresholdJewelDuration
Cold to Fire Support	Damage, Attack
Combustion Support	Damage, Attack
Elemental Damage with Attacks Support	Attack, ThresholdJewelRangedAttack
Life Gain on Hit Support	Attack, ThresholdJewelRangedAttack
Elemental Proliferation Support	Damage, Attack, ElementalStatus
Culling Strike Support	Damage, Attack
Point Blank Support	RangedAttack, ThresholdJewelRangedAttack
Iron Grip Support	RangedAttack, ThresholdJewelRangedAttack
Damage on Full Life Support	Attack
Blastchain Mine Support	Mineable
Chance to Flee Support	Attack, Damage
Blind Support	Damage, Attack
Ballista Totem Support	RangedAttack, Totemable, AND
Fire Penetration Support	Damage, Attack
Cold Penetration Support	Damage, Attack
Lightning Penetration Support	Damage, Attack
Elemental Penetration Support	Damage, Attack
Chain Support	Chains, Projectile, ThresholdJewelProjectile, ThresholdJewelRangedAttack, ThresholdJewelChaining
Fork Support	Projectile, ThresholdJewelProjectile, ThresholdJewelRangedAttack
Power Charge On Critical Support	Damage, Attack
Burning Damage Support	Damage, Attack, CausesBurning
Hextouch Support	Attack, Damage
Cast On Critical Strike Support	Attack
Slower Projectiles Support	Projectile, ProjectileSpeed, ThresholdJewelProjectile, ThresholdJewelRangedAttack
Less Duration Support	Duration, ThresholdJewelDuration
Vicious Projectiles Support	RangedAttack, ThresholdJewelRangedAttack
Block Chance Reduction Support	Damage, Attack
Physical to Lightning Support	Damage, Attack
Ice Bite Support	Damage, Attack
Hypothermia Support	Damage, Attack, DamageOverTime
Innervate Support	Damage, Attack
Critical Strike Affliction Support	Damage, Attack
Void Manipulation Support	Damage, Attack, DamageOverTime
Controlled Destruction Support	Damage, Attack, DegenOnlySpellDamage
Swift Affliction Support	Duration, ThresholdJewelDuration, Damage, Attack
Elemental Focus Support	Damage, Attack, CausesBurning, NonHitChill
Ignite Proliferation Support	Damage, Attack
Chance to Bleed Support	Attack
Chance to Poison Support	Damage, Attack
Deadly Ailments Support	Damage, Attack
Decay Support	Damage, Attack
Efficacy Support	Damage, Attack, DegenOnlySpellDamage, Duration, ThresholdJewelDuration, DamageOverTime
Vile Toxins Support	Damage, Attack
Maim Support	Attack, AppliesMaim
Immolate Support	Damage, Attack
Unbound Ailments Support	Damage, Attack, ElementalStatus
Brutality Support	Damage, Attack, DamageOverTime
Onslaught Support	Damage, Attack
Volley Support	ProjectilesFromUser
Summon Phantasm Support	Attack, Damage, CreatesMinion
Mirage Archer Support	MirageArcherCanUse
Withering Touch Support	Attack
Bonechill Support	Attack, Damage, NonHitChill, ChillingArea
Energy Leech Support	Damage, Attack
Impale Support	Attack
Nightblade Support	Attack
High-Impact Mine Support	Mineable
Arrow Nova Support	Projectile, ThresholdJewelProjectile, OR, RangedAttack, ThresholdJewelRangedAttack, OR, AND, ProjectilesFromUser, AND
Barrage Support	Projectile, ThresholdJewelProjectile, OR, ProjectileNumber, OR, RangedAttack, ThresholdJewelRangedAttack, OR, AND
Awakened Added Fire Damage Support	Damage, Attack
Awakened Brutality Support	Damage, Attack, DamageOverTime
Awakened Burning Damage Support	Damage, Attack, CausesBurning
Awakened Elemental Damage with Attacks Support	Attack, ThresholdJewelRangedAttack
Awakened Fire Penetration Support	Damage, Attack
Awakened Added Cold Damage Support	Attack, Damage
Awakened Arrow Nova Support	Projectile, ThresholdJewelProjectile, OR, RangedAttack, ThresholdJewelRangedAttack, OR, AND, ProjectilesFromUser, AND
Awakened Cast On Critical Strike Support	Attack
Awakened Chain Support	Chains, Projectile, ThresholdJewelProjectile, ThresholdJewelRangedAttack, ThresholdJewelChaining
Awakened Cold Penetration Support	Damage, Attack
Awakened Deadly Ailments Support	Damage, Attack
Awakened Fork Support	Projectile, ThresholdJewelProjectile, ThresholdJewelRangedAttack
Awakened Greater Multiple Projectiles Support	Projectile, ThresholdJewelProjectile, ThresholdJewelRangedAttack, ProjectileNumber
Awakened Swift Affliction Support	Duration, ThresholdJewelDuration, Damage, Attack
Awakened Void Manipulation Support	Damage, Attack, DamageOverTime
Awakened Vicious Projectiles Support	RangedAttack, ThresholdJewelRangedAttack
Awakened Added Chaos Damage Support	Damage, Attack
Awakened Added Lightning Damage Support	Attack, Damage
Awakened Controlled Destruction Support	Damage, Attack, DegenOnlySpellDamage
Awakened Hextouch Support	Attack, Damage
Awakened Elemental Focus Support	Damage, Attack, CausesBurning, NonHitChill
Awakened Increased Area of Effect Support	Area, MinionsCanExplode, ThresholdJewelArea
Awakened Lightning Penetration Support	Damage, Attack
Awakened Unbound Ailments Support	Damage, Attack, ElementalStatus
Trinity Support	Damage, Attack
Bloodthirst Support	Attack
Cruelty Support	Damage, Attack

Community Wiki

Wiki Edit

Caustic Arrow

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 Support) that increase projectile damage will increase both the damage on hit and the area of effect damage.
Concentrated Effect: Concentrated Effect Support 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.
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 Support 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 Support 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 Mark requires the target to be hit. The caustic ground won't be affected by it.Despair does affect the caustic ground.

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