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Gem

Arc
Spell, Chaining, Lightning
Level: 1–20
Cast Time: 0.7 Second
Critical Strike Chance: 5%
Effectiveness of Added Damage: 80%
Requires Level 12
An 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:
0.5% chance to Shock
Deals (6–133) to (33–754) Lightning Damage
10% chance to Shock
Chains +(4–7) Times
(10–29)% increased Effect of Shock
15% more Damage for each remaining Chain
arc_chain_distance [25]
arc_enhanced_behaviour
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
VaalVaal Arc
DropLevel12
BaseTypeArc
ClassActive Skill Gems
TargetTypesEnemy, Ground
ActiveTypeSpell, Hit, SkillCanTrap, SpellCanTotem, SkillCanMine, Chaining, SpellCanRepeat, LightningSkill, Triggerable, CanRapidFire
Useful Link
NameRequires LevelTag
Faster Casting Support18Support Spell
Lightning Penetration Support31Lightning Support
Spell Echo Support38Spell Support
Life Leech Support31Support
Empower Support38 Support
Quest Reward
ActCharacterQuest Complete
1WitchThe Siren's Cadence
Quest Vendor
CharacterNPCQuest Complete
WitchNessaThe Siren's Cadence
TemplarNessaThe Siren's Cadence
ShadowNessaThe Siren's Cadence
Lilly RothFallen from Grace
SiosaA Fixture of Fate
Implicit
Supported Skills have 10% chance to Shock
15% more Damage for each remaining Chain
arc_chain_distance [25]
Level Effect
LevelRequires LevelIntelligenceMana CostDeals 6 to Lightning DamageDeals 33 to Lightning DamageSupported Skills Chain +4 times10% increased Effect of ShockExperience
11232863341015,249
21539974141141,517
319471095441281,983
42356111270413147,968
52764121689414250,557
631721320112515405,086
735811425139516447,718
838871529163517615,318
941931634191518834,639
104410016392235191,570,760
114710617462586201,633,987
125011218532996212,151,030
135311919613466222,812,189
145612519703996235,099,360
155913120814586249,400,731
1662137219352672515,273,366
17641422110257772626,286,582
18661462211163172762,890,590
196815022122690728212,046,017
207015423133754729
217224145824830
227424159900831
237625173982832
2478251891070833
2580262061167834
2682262241271935
2784272441384936
2886272661506937
2988282891639938
3090283141782939
31912832818581039
32922934219371040
33932935620191040
34942937121051041
35952938721931041
36963040322861142
37973042023821142
38983043824821143
39993045625861143
401003147526941144

helmet /1051

LevelModDrop Rate
The Merciless Labyrinth25% increased Arc Damagehelmet(0.1%)
The Eternal Labyrinth40% increased Arc Damagehelmet(0.08%)
The Merciless Labyrinth25% increased Arctic Breath Damagehelmet(0.1%)
The Eternal Labyrinth40% increased Arctic Breath Damagehelmet(0.08%)
The Merciless LabyrinthArc Chains an additional time
The Eternal LabyrinthArc Chains an additional timehelmet(0.08%)
The Merciless LabyrinthArc has +20% chance to Shockhelmet(0.1%)
The Eternal LabyrinthArc has +30% chance to Shockhelmet(0.08%)
The Merciless LabyrinthArc deals 8% increased Damage for each time it has Chainedhelmet(0.1%)
The Eternal LabyrinthArc deals 12% increased Damage for each time it has Chainedhelmet(0.08%)
The Merciless Labyrinth24% increased Arctic Armour Buff Effecthelmet(0.1%)
The Eternal Labyrinth36% increased Arctic Armour Buff Effecthelmet(0.1%)
The Merciless LabyrinthArctic Armour has 20% reduced Mana Reservationhelmet(0.1%)
The Eternal LabyrinthArctic Armour has 30% reduced Mana Reservationhelmet(0.1%)
The Merciless Labyrinth24% increased Arctic Breath Durationhelmet(0.1%)
The Eternal Labyrinth36% increased Arctic Breath Durationhelmet(0.08%)
The Merciless Labyrinth8% increased Arctic Breath Area of Effecthelmet(0.1%)
The Eternal Labyrinth12% increased Arctic Breath Area of Effecthelmet(0.08%)
The Eternal LabyrinthArctic Breath's Chilling Area has 38% increased Movement Speedhelmet(0.08%)