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Arc

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ArcSpell, Chaining, Lightning
Mana Cost: (9 to 26)
Cast Time: 0.80 sec
Critical Strike Chance: 5.00%
Damage Effectiveness: 70%
Drop Level: 12
Requires Level 12
An arc of lightning stretches from the caster to a targeted nearby enemy and chains on to additional targets.Per 1% Quality:
0.5% chance to Shock enemies
Deals (2-47) to (35-886) Lightning Damage
10% chance to Shock enemies
Chain +(2-7) Times
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

Arc skill screenshot.jpg

Arc is a lightning spell that creates a chaining pulse.

Skill Functions and Interactions

  • Since it is not a projectile, Arc cannot Pierce Support inventory icon.pngPierce SupportPierce SupportSupport, Projectile
    Icon: p
    Mana Multiplier: 130%
    Drop Level: 31
    Requires Level 31
    Per 1% Quality:
    0.5% increased Projectile Damage
    50% chance of Projectiles Piercing
    (10-19)% 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.
    Pierce Support inventory icon.png
    or Fork Support inventory icon.pngFork SupportFork SupportSupport, Projectile
    Icon: Y
    Mana Multiplier: 130%
    Drop Level: 31
    Requires Level 31
    Per 1% Quality:
    0.5% increased Projectile Damage
    (30-11)% less Projectile Damage
    Projectiles Fork
    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.
    Fork Support inventory icon.png
    , and it cannot be supported with Greater Multiple Projectiles Support inventory icon.pngGreaterGreater Multiple Projectiles SupportSupport, Projectile
    Icon: P
    Mana Multiplier: 165%
    Drop Level: 38
    Requires Level 38
    Per 1% Quality:
    0.5% increased Attack Speed
    0.5% increased Cast Speed
    4 additional Projectiles
    (35-26)% less 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.
    Greater Multiple Projectiles Support inventory icon.png
    or Lesser Multiple Projectiles Support inventory icon.pngLesserLesser Multiple Projectiles SupportSupport, Projectile
    Icon: l
    Mana Multiplier: 140%
    Drop Level: 8
    Requires Level 8
    Per 1% Quality:
    0.5% increased Attack Speed
    0.5% increased Cast Speed
    2 additional Projectiles
    (25-16)% less 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.
    Lesser Multiple Projectiles Support inventory icon.png
    Multiple Projectiles. Supporting Arc with Chain Support inventory icon.pngChain SupportChain SupportSupport, Chaining, Projectile
    Icon: c
    Mana Multiplier: 150%
    Drop Level: 38
    Requires Level 38
    Per 1% Quality:
    1% increased Projectile Speed
    Chain +2 Times
    (50-31)% 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.
    Chain Support inventory icon.png
    will result in additional chains.
  • Arc will chain to a random target within a specified radius centered on last target struck. Arc cannot chain back to the same target immediately, and must bounce one more time before chaining to the previous target.
  • Arc, when not cast at any enemy, will target the nearest one within the skill's range.

Gem level progression

LevelLvl.intelligenceMana
Cost
Lightning
Damage
# ChainsExp.Total Exp.
1123392 to 35200
21539102 to 44215,24915,249
31948113 to 58241,51756,766
42356124 to 76381,983138,749
52764135 to 973147,968286,717
63173146 to 1233250,557537,274
73581168 to 1543405,086942,360
838881610 to 1824447,7181,390,078
941941711 to 2144615,3182,005,396
10441001813 to 2504834,6392,840,035
11471061915 to 29241,570,7604,410,795
12501132018 to 34051,633,9876,044,782
13531192121 to 39552,151,0308,195,812
14561252224 to 45852,812,18911,008,001
15591322328 to 52955,099,36016,107,361
16621382432 to 61069,400,73125,508,092
17641422435 to 671615,273,36640,781,458
18661462539 to 736626,286,58267,068,040
19681512543 to 808662,890,590129,958,630
20701552647 to 8867212,046,017342,004,647
21721592651 to 9717N/AN/A
2274N/A2656 to 10647N/AN/A
2376N/A2761 to 11647N/AN/A
2478N/A2867 to 12748N/AN/A
2580N/A2973 to 13938N/AN/A
2682N/A3080 to 15238N/AN/A
2784N/A3088 to 16638N/AN/A
2886N/A3096 to 18169N/AN/A
2988N/A31104 to 19839N/AN/A
3090N/A32114 to 21639N/AN/A

Quest reward

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

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

Cost:
Orb of Transmutation inventory icon.pngOrb of TransmutationOrb of TransmutationStack Size: 40Drop Level: 1Upgrades a normal item to a magic itemRight click this item then left click a normal item to apply it.
Shift click to unstack.
Orb of Transmutation inventory icon.png
no
yes
yes
yes
no
no
no

Related helmet enchantments

There are helmet enchantments that affect Arc:

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)
EnchantmentArcDamage16625% increased Arc Damage
EnchantmentArcDamage27540% increased Arc Damage
EnchantmentArcNumOfAdditionalProjectilesInChain166Arc Chains an additional 2 times
EnchantmentArcNumOfAdditionalProjectilesInChain275Arc Chains an additional 3 times
EnchantmentArcShockChance166Arc has +20% chance to Shock
EnchantmentArcShockChance275Arc has +30% chance to Shock

Version history

Version Changes
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.
1.2.0
  • We have reduced the damage by 15% at all levels.
  • Got +1% to critical hit chance bringing it to 5%
1.1.2
  • Arc inventory icon.pngArcArcSpell, Chaining, Lightning
    Mana Cost: (9 to 26)
    Cast Time: 0.80 sec
    Critical Strike Chance: 5.00%
    Damage Effectiveness: 70%
    Drop Level: 12
    Requires Level 12
    An arc of lightning stretches from the caster to a targeted nearby enemy and chains on to additional targets.Per 1% Quality:
    0.5% chance to Shock enemies
    Deals (2-47) to (35-886) Lightning Damage
    10% chance to Shock enemies
    Chain +(2-7) Times
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    Arc skill icon.png
    Arc inventory icon.png
    and Vaal Arc inventory icon.pngVaal ArcVaal ArcVaal, Spell, Chaining, Lightning
    Souls per use: 32 (N) / 48 (C) / 64 (M)
    Can store 1 use(s)
    Cast Time: 0.80 sec
    Critical Strike Chance: 5.00%
    Damage Effectiveness: 80%
    Drop Level: 12
    Requires Level 12
    An arc of lightning stretches from the caster to a targeted nearby enemy and chains on to many additional targets.Per 1% Quality:
    1.5% increased Shock Duration on enemies
    Deals (2-49) to (35-938) Lightning Damage
    100% chance to Shock enemies
    Chain +40 Times
    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
    Vaal Arc inventory 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.