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ArcSpell, Chaining, Lightning
Level: (1-20)
Cost: (8-23) Mana
Cast Time: 0.70 sec
Critical Strike Chance: 5.00%
Effectiveness of Added Damage: 80%
Requires Level 12An arc of lightning stretches from the caster to a targeted enemy and chains on to other nearby enemies. Each time the main beam chains it will also chain to a second enemy, but that secondary arc cannot chain further.Per 1% Quality:1Superior2Anomalous3Divergent4Phantasmal0.5% chance to Shock enemies1% increased Chaining range0.5% increased Damage for each time this Skill has Chained1% reduced Enemy Stun ThresholdDeals (6-133) to (33-754) Lightning Damage
10% chance to Shock enemies
Chains +(4-7) Times
(10-29)% increased Effect of Lightning Ailments
15% more Damage for each remaining Chain
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Arc skill icon.pngArc inventory icon.png
Acquisition
Area level: 12
Vendor Prices
Normal1x Orb of Transmutation
Vendor Offer
1x Scroll Fragment
Metadata
Item class: Active Skill Gems
Metadata ID: Metadata/Items/Gems/SkillGemArc

Arc skill screenshot.jpg


For the Vaal-themed counterpart, see Vaal Arc.

Arc is a lightning spell that creates a chaining pulse of electricity.

Skill functions and interactions

  • Chain: Arc deals 15% more damage per remaining chain. Arc gains base chains from gem level, and additional sources of chain such as Chain SupportChain SupportSupport, Chaining, Projectile
    Icon: c
    Level: (1-20)
    Cost & Reservation Multiplier: 150%
    Requires Level 38Supports projectile skills, and any other skills that chain.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills have 1% increased Projectile SpeedSupported Skills have 1% increased Chaining rangeProjectiles Fired by Supported Skills have 4% chance not to Pierce EnemiesSupported Skills Chain +2 times
    Supported Skills deal (30-11)% less Damage with Hits
    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.
    are also taken into account for this bonus.
    • Every time Arc chains, a secondary Arc is created that hits an additional nearby enemy. This secondary Arc cannot chain further.
    • Arc remembers the last two enemies hit by the main Arc, and will not hit these enemies again. This means at least 3 enemies are required before the main Arc can hit the same enemy twice.

Gem level progression

LevelRequired LevelRequired IntelligenceMana
Cost
Lightning
Damage
ChainsShock
Effect
Exp.Total Exp.
1123386 to 33+4N/A00
2153997 to 41+4N/A1524915249
31948109 to 54+4N/A4151756766
423561112 to 70+4N/A81983138749
527641216 to 89+4N/A147968286717
631731320 to 112+5N/A250557537274
735811425 to 139+5N/A405086942360
838881529 to 163+5N/A4477181390078
941941634 to 191+5N/A6153182005396
10441001639 to 223+5N/A8346392840035
11471061746 to 258+6N/A15707604410795
12501131853 to 299+6N/A16339876044782
13531191961 to 346+6N/A21510308195812
14561251970 to 399+6N/A281218911008001
15591322081 to 458+6N/A509936016107361
16621382193 to 526+7N/A940073125508092
176414221102 to 577+7N/A1527336640781458
186614622111 to 631+7N/A2628658267068040
196815122122 to 690+7N/A62890590129958630
207015523133 to 754+7N/A212046017342004647
217215924145 to 824+8N/AN/AN/A
2274N/A24159 to 900+8N/AN/AN/A
2376N/A25173 to 982+8N/AN/AN/A
2478N/A25189 to 1070+8N/AN/AN/A
2580N/A26206 to 1167+8N/AN/AN/A
2682N/A26224 to 1271+9N/AN/AN/A
2784N/A27244 to 1384+9N/AN/AN/A
2886N/A27266 to 1506+9N/AN/AN/A
2988N/A28289 to 1639+9N/AN/AN/A
3090N/A28314 to 1782+9N/AN/AN/A
3191N/A28328 to 1858+10N/AN/AN/A
3292N/A29342 to 1937+10N/AN/AN/A
3393N/A29356 to 2019+10N/AN/AN/A
3494N/A29371 to 2105+10N/AN/AN/A
3595N/A29387 to 2193+10N/AN/AN/A
3696N/A30403 to 2286+11N/AN/AN/A
3797N/A30420 to 2382+11N/AN/AN/A
3898N/A30438 to 2482+11N/AN/AN/A
3999N/A30456 to 2586+11N/AN/AN/A
40100N/A31475 to 2694+11N/AN/AN/A

Item acquisition
Questionmark.png

Upgrade paths

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

AmountIngredientGeneral
Notes
Type
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
13The CataclysmThe Cataclysm13Level 21 Spell Gem
Corrupted
The mighty warriors traded in blows, the nimble archers in arrows, yet it was the brazen thaumaturgists who would bring catastrophe to all.
random corrupted level 21 Spell 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 ↓
The Siren's Cadence
Act 1

Vendor reward

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

Class →WitchShadowRangerDuelistMarauderTemplarScion
Quest ↓
The Siren's Cadence
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 Arc.

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 Arc Damage 16625% increased Arc Damagehelmet 100
default 0
Enchantment Arc Damage 27540% increased Arc Damagehelmet 75
default 0
Enchantment Arc Damage Per Chain 166Arc deals 8% increased Damage for each time it has Chainedhelmet 100
default 0
Enchantment Arc Damage Per Chain 275Arc deals 12% increased Damage for each time it has Chainedhelmet 75
default 0
Enchantment Arc Num Of Additional Projectiles In Chain 175Arc Chains an additional timehelmet 75
default 0
Enchantment Arc Shock Chance 166Arc has +20% chance to Shockhelmet 100
default 0
Enchantment Arc Shock Chance 275Arc has +30% chance to Shockhelmet 75
default 0

Alternate skill effects

Arc has the following alternate skill effects:

ItemEffect(s)
Automaton Arc EffectAutomaton Arc EffectSkill Gem EffectYour Arc becomes an Automaton Effect.Your Arc becomes an Automaton Effect.
Celestial Arc EffectCelestial Arc EffectSkill Gem EffectYour Arc becomes a Celestial Effect.Your Arc becomes a Celestial Effect.
Purple ArcPurple ArcSkill Gem EffectYour Arc becomes a Purple Effect.Your Arc becomes a Purple Effect.

Version history

Version Changes
3.11.0
  • The visual effects have been improved.
3.9.0
  • The range at which Arc can chain to another enemy is now 35 units (from 25).
  • Arc has received visual improvements.
3.6.2
  • Arc's effect now visually hits monsters more centrally.
3.6.0
  • Mana Cost at gem level 1 is now 8 (was 9).
  • Mana Cost at gem level 20 is now 23 (was 26).
  • Now has a cast time of 0.7 seconds (from 0.8).
  • Now deals 6 to 33 Lightning damage at gem level 1 (from 7 to 37) and 133 to 754 Lightning damage at gem level 20 (from 152 to 862).
  • Now has an added damage effectiveness of 80% (from 90%).
  • Lowered the range at which Arc can chain from 50 units to 25 units.
3.3.0
  • Now has an added damage effectiveness of 90% (up from 70%).
  • Now deals 7-37 lightning damage at gem level 1 (up from 2-35), up to 152-862 lightning damage at gem level 20 (up from 47-886).
  • Now deals 15% more damage for each remaining chain.
  • Can now split to an extra enemy whenever it chains. These splits cannot then chain.
  • Chains 4 times at level 1, up to 7 times at level 20.
3.0.0
  • Arc now has 10% increased Shock Effect at gem level 1, gaining 1% per gem level.
2.1.0
  • Damage increased by around 20% higher at level 20.
  • In addition to having more damage, Arc now increases in number of chains more often as it levels up. At level 20, it chains seven times. Previously this was five.
2.0.0
  • Damage reduced slightly at all levels. At player level 68, it should deal approximately 8% less damage.
1.3.1
  • (PvP) Arc damage has been increased by 5%. The total reduction is now 5% (up from 10% reduction previously).
1.2.0
  • We have reduced the damage by 15% at all levels.
  • Got +1% to critical hit chance bringing it to 5%
1.1.2
  • ArcArcSpell, Chaining, Lightning
    Level: (1-20)
    Cost: (8-23) Mana
    Cast Time: 0.70 sec
    Critical Strike Chance: 5.00%
    Effectiveness of Added Damage: 80%
    Requires Level 12An arc of lightning stretches from the caster to a targeted enemy and chains on to other nearby enemies. Each time the main beam chains it will also chain to a second enemy, but that secondary arc cannot chain further.Per 1% Quality:1Superior2Anomalous3Divergent4Phantasmal0.5% chance to Shock enemies1% increased Chaining range0.5% increased Damage for each time this Skill has Chained1% reduced Enemy Stun ThresholdDeals (6-133) to (33-754) Lightning Damage
    10% chance to Shock enemies
    Chains +(4-7) Times
    (10-29)% increased Effect of Lightning Ailments
    15% more Damage for each remaining Chain
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    Arc skill icon.png
    and Vaal ArcVaal ArcVaal, Spell, Chaining, Lightning, Duration
    Level: (1-20)
    Souls Per Use: 25
    Can Store 1 Use(s)
    Soul Gain Prevention: 0 sec
    Cast Time: 0.80 sec
    Critical Strike Chance: 5.00%
    Effectiveness of Added Damage: 180%
    Requires Level 12A shocking arc of lightning stretches from the caster to a targeted enemy and chains to other nearby enemies. Each time the beam chains it will also chain simultaneously to a second enemy, but no enemy can be hit twice by the beams. Also grants a buff making you lucky when damaging enemies with Arc for a short duration.Per 1% Quality:1Superior1.5% increased Duration of Lightning AilmentsBase duration is 4 seconds
    Deals (38-924) to (64-1539) Lightning Damage
    100% chance to Shock enemies
    Chains +(5-9) Times
    100% increased Effect of Lightning Ailments
    100% increased Duration of Lightning Ailments
    15% more Damage for each remaining Chain
    Modifiers to Buff Duration also apply to this Skill's Soul Gain Prevention
    Corrupted
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    Vaal Arc skill icon.png
    have had their damage increased by 60%. Arc and Vaal Arc can now no longer chain back to the same target immediately, but must now bounce one more time. Arc now increases in chain counts as the gem increases in level.
1.0.0
  • Reduced the mana cost.
  • Damage has been increased by around 23%.
0.11.1
  • Spells with Damage Effectiveness no longer have their own damage affected by Damage Effectiveness.
    Damage values on these skills have been updated to reflect this.
0.9.13
  • Arc has been added to the game.