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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%
Requires Level 12An 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
Chains +(2-7) Times
(10-29)% increased Effect of Shock
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
Level: 12
Purchase Costs
Normal1x Orb of Transmutation
Sell Price
1x Scroll Fragment

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 SupportPierce SupportSupport, Projectile
    Icon: p
    Mana Multiplier: 110%
    Supports projectile skills.Per 1% Quality:
    Supported Skills deal 0.5% increased Projectile Damage
    Projectiles from Supported Skills Pierce (2-4) additional Targets
    Supported Skills deal (0-19)% 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.
    or Fork SupportFork SupportSupport, Projectile
    Icon: Y
    Mana Multiplier: 130%
    Requires Level 31Supports projectile skills, making their projectiles fork into two projectiles the first time they hit an enemy and don't pierce it.Per 1% Quality:
    Supported Skills deal 0.5% increased Projectile Damage
    Supported Skills deal (30-11)% less Projectile Damage
    Supported Skills 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.
    , and it cannot be supported with GreaterGreater Multiple Projectiles SupportSupport, Projectile
    Icon: P
    Mana Multiplier: 165%
    Requires Level 38Supports projectile skills.Per 1% Quality:
    Supported Skills have 0.5% increased Attack Speed
    Supported Skills have 0.5% increased Cast Speed
    Supported Skills have 4 additional Projectiles
    Supported Skills deal (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.
    or LesserLesser Multiple Projectiles SupportSupport, Projectile
    Icon: l
    Mana Multiplier: 140%
    Requires Level 8Supports projectile skills.Per 1% Quality:
    Supported Skills have 0.5% increased Attack Speed
    Supported Skills have 0.5% increased Cast Speed
    Supported Skills have 2 additional Projectiles
    Supported Skills deal (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.
    Multiple Projectiles. Supporting Arc with Chain SupportChain SupportSupport, Chaining, Projectile
    Icon: c
    Mana Multiplier: 150%
    Requires Level 38Supports projectile skills, and any other skills that chain.Per 1% Quality:
    Supported Skills have 1% increased Projectile Speed
    Supported Skills Chain +2 times
    Supported Skills deal (50-31)% 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.
    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
# ChainsShock EffectExp.Total Exp.
1123392 to 35210%00
21539102 to 44211%15,24915,249
31948113 to 58212%41,51756,766
42356124 to 76313%81,983138,749
52764135 to 97314%147,968286,717
63173146 to 123315%250,557537,274
73581168 to 154316%405,086942,360
838881610 to 182417%447,7181,390,078
941941711 to 214418%615,3182,005,396
10441001813 to 250419%834,6392,840,035
11471061915 to 292420%1,570,7604,410,795
12501132018 to 340521%1,633,9876,044,782
13531192121 to 395522%2,151,0308,195,812
14561252224 to 458523%2,812,18911,008,001
15591322328 to 529524%5,099,36016,107,361
16621382432 to 610625%9,400,73125,508,092
17641422435 to 671626%15,273,36640,781,458
18661462539 to 736627%26,286,58267,068,040
19681512543 to 808628%62,890,590129,958,630
20701552647 to 886729%212,046,017342,004,647
21721592651 to 971730%N/AN/A
2274N/A2656 to 1064731%N/AN/A
2376N/A2761 to 1164732%N/AN/A
2478N/A2867 to 1274833%N/AN/A
2580N/A2973 to 1393834%N/AN/A
2682N/A3080 to 1523835%N/AN/A
2784N/A3088 to 1663836%N/AN/A
2886N/A3096 to 1816937%N/AN/A
2988N/A31104 to 1983938%N/AN/A
3090N/A32114 to 2163939%N/AN/A

Quest reward

This skill is given as quest reward for the following quests:
ClassMarauderTemplarWitchShadowRangerDuelistScion
Quest
The Siren's Cadence
Act 1
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
no
yes
yes
yes
no
no
no
A Fixture of Fate
Act 3
Siosa
yes
Fallen from Grace
Act 6
Lilly Roth
yes

Related helmet enchantments

The following helmet enchantments 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
  • ArcArcSpell, Chaining, Lightning
    Mana Cost: (9 to 26)
    Cast Time: 0.80 sec
    Critical Strike Chance: 5.00%
    Damage Effectiveness: 70%
    Requires Level 12An 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
    Chains +(2-7) Times
    (10-29)% increased Effect of Shock
    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
    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%
    Requires Level 12An 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
    Chains +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
    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.