Arc

Spell, Chaining, Lightning

Level: (1–20)

Cost: (8–23) Mana

Cast Time: 0.70 sec

Critical Strike Chance: 6.00%

Effectiveness of Added Damage: 120%

Requires Level (12–70), (33–155) Int

An arc of lightning reaches from the caster to a targeted enemy and chains to other enemies, but not immediately back. Each time the arc chains, it will also chain a secondary arc to another enemy that the main arc has not already hit, which cannot chain further.

Deals (6–198) to (32–1122) Lightning Damage
Chains +(4–7) Times
15% more Damage with Hits and Ailments for each remaining Chain

Additional Effects From Quality:

Chains +(0–1) Times

Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.

Quest /2

Act	Quest	NPC	Character
1	The Siren's Cadence	Quest Reward	Witch
1	The Siren's Cadence	Nessa	Shadow · Templar · Witch

Genus

Level Effect /40

Implicit
15% more Damage with Hits and Ailments for each remaining Chain

Level	Requires Level	Int	Cost	Deals 6 to 32 Lightning Damage	Chains +4 Times	Experience
1	12	33	8	6, 32	4	15,249
2	15	39	9	7, 41	4	41,517
3	19	48	10	10, 56	4	81,983
4	23	56	11	13, 75	4	147,968
5	27	64	12	17, 98	4	250,557
6	31	73	13	22, 127	5	405,086
7	35	81	14	29, 162	5	447,718
8	38	88	15	34, 194	5	615,318
9	41	94	16	41, 232	5	834,639
10	44	100	16	49, 276	5	1,570,760
11	47	106	17	58, 327	6	1,633,987
12	50	113	18	68, 387	6	2,151,030
13	53	119	19	81, 457	6	2,812,189
14	56	125	19	95, 538	6	5,099,360
15	59	132	20	111, 631	6	9,400,731
16	62	138	21	131, 740	7	15,273,366
17	64	142	21	145, 822	7	26,286,582
18	66	146	22	161, 912	7	62,890,590
19	68	151	22	179, 1012	7	212,046,017
20	70	155	23	198, 1122	7
21	72		24	219, 1242	8
22	74		24	243, 1375	8
23	76		25	269, 1522	8
24	78		25	297, 1683	8
25	80		26	328, 1859	8
26	82		26	362, 2054	9
27	84		27	400, 2268	9
28	86		27	442, 2503	9
29	88		28	487, 2761	9
30	90		28	537, 3044	9
31	91		28	564, 3196	10
32	92		29	592, 3356	10
33	93		29	622, 3522	10
34	94		29	652, 3697	10
35	95		29	685, 3880	10
36	96		30	719, 4072	11
37	97		30	754, 4273	11
38	98		30	791, 4483	11
39	99		30	830, 4703	11
40	100		31	871, 4934	11

Attribute /9

Key	Value
Cost	iLvl 1: Normal: 1xOrb of Transmutation
Acronym	Hit, Shock
DropLevel	12
BaseType	Arc
Class	Skill Gems
TargetTypes	Ground, Enemy
Type	Spell, Damage, Trappable, Totemable, Mineable, Chains, Multicastable, Triggerable, Lightning, CanRapidFire
ItemType	Metadata/Items/Gems/SkillGemArc
Reference	poe.ninja, Community Wiki

Crucible Weapon /28

Weight	Desc
100 (T2)	-3% Chance to Block Allocates Arcane Sanctuary
300 (T3, T4)	20% reduced Effect of Arcane Surge on you 10% chance to Gain Arcane Surge when you deal a Critical Strike
300 (T3, T4)	20% reduced Effect of Arcane Surge on you 10% chance to Gain Arcane Surge when you deal a Critical Strike
300 (T3, T4)	20% reduced Effect of Arcane Surge on you 15% chance to Gain Arcane Surge when you deal a Critical Strike
300 (T3, T4)	20% reduced Effect of Arcane Surge on you 15% chance to Gain Arcane Surge when you deal a Critical Strike
300 (T3, T4)	20% increased Effect of Arcane Surge on you Buffs on you expire 10% faster
300 (T3, T4)	25% increased Effect of Arcane Surge on you Buffs on you expire 10% faster
300 (T3, T4)	40% increased Effect of Arcane Surge on you Buffs on you expire 20% faster
300 (T3, T4)	50% increased Effect of Arcane Surge on you Buffs on you expire 20% faster
250 (T3, T4)	20% increased Warcry Buff Effect Warcry Skills have 20% reduced Area of Effect
250 (T3, T4)	30% increased Warcry Buff Effect Warcry Skills have 20% reduced Area of Effect
250 (T3, T4)	35% increased Warcry Buff Effect Warcry Skills have 30% reduced Area of Effect
250 (T3, T4)	50% increased Warcry Buff Effect Warcry Skills have 30% reduced Area of Effect
250 (T3, T4)	30% reduced Damage 25% increased Damage for each time you've Warcried Recently
250 (T3, T4)	30% reduced Damage 40% increased Damage for each time you've Warcried Recently
250 (T3, T4)	50% reduced Damage 40% increased Damage for each time you've Warcried Recently
250 (T3, T4)	50% reduced Damage 60% increased Damage for each time you've Warcried Recently
100 (T3, T4)	Socketed Gems are Supported by Level 10 Arcane Surge
100 (T4)	Socketed Gems are Supported by Level 10 Arcane Surge
25 (T3, T4)	Socketed Gems are Supported by Level 10 Arcane Surge
25 (T4)	Socketed Gems are Supported by Level 10 Arcane Surge
1000 (T5)	Enemies Branded by Wintertide Brand or Arcanist Brand Explode on Death dealing a quarter of their maximum Life as Chaos damage
1000 (T5)	Ice Trap and Lightning Trap Damage Penetrates 15% of Enemy Elemental Resistances Ice Traps and Lightning Traps are triggered by your Warcries Ice Traps and Lightning Traps cannot be triggered by Enemies
1000 (T5)	Ice Trap and Lightning Trap Damage Penetrates 25% of Enemy Elemental Resistances Ice Traps and Lightning Traps are triggered by your Warcries Ice Traps and Lightning Traps cannot be triggered by Enemies
1000 (T5)	Arc and Crackling Lance gains Added Cold Damage equal to 12% of Mana Cost, if Mana Cost is not higher than the maximum you could spend 15% increased Cost of Arc and Crackling Lance
1000 (T5)	Arc and Crackling Lance gains Added Cold Damage equal to 20% of Mana Cost, if Mana Cost is not higher than the maximum you could spend 25% increased Cost of Arc and Crackling Lance
1000 (T1, T2, T3, T4, T5)	Socketed Gems are Supported by Level 30 Arcane Surge
1000 (T1, T2, T3, T4, T5)	Socketed Gems are Supported by Level 30 Archmage

Arc Monster /36 ⍟

Name	Modifiers	Spectre
Rukuku, the Pagan God	4000% increased Quantity of Items Dropped 1000% increased Rarity of Items Dropped	Y
Crackling Essence	damage taken +% from spike traps final [-100] damage taken +% from arrow traps final [-100] immune to labyrinth degen effect [1] immune to lava damage [1]	Y
Blackguard Arcmage	20% Chance to Block Spell Damage You take 10% of Damage from Blocked Hits	Y
Elder-Blessed Arcmage	visual attached elder tentacles [1] 20% Chance to Block Spell Damage You take 10% of Damage from Blocked Hits	Y
Piety	5000% increased Rarity of Items Dropped Monsters grant 250% increased Experience cannot be taunted when taunted ms [0] 65% reduced Energy Shield Recharge Rate cannot be stunned for ms after stun finished [2000] cannot be stunned while stunned [1] heal aura owner % max life on death [0]	Y
Piety	5000% increased Rarity of Items Dropped Monsters grant 250% increased Experience cannot be taunted when taunted ms [0] 65% reduced Energy Shield Recharge Rate cannot be stunned for ms after stun finished [2000] cannot be stunned while stunned [1]	Y
Piety	65% reduced Energy Shield Recharge Rate cannot be stunned for ms after stun finished [2000] cannot be stunned while stunned [1] monster no drops or experience [1] heal aura owner % max life on death [0]	Y
Galvanic Ribbon		Y
Totem		Y
Herald of Thunder	15000% increased Rarity of Items Dropped Monsters grant 100% increased Experience You can apply an additional Curse cannot be stunned for ms after stun finished [2000] cannot be stunned while stunned [1]	Y
The Wicked One	15000% increased Rarity of Items Dropped Monsters grant 100% increased Experience 65% reduced Energy Shield Recharge Rate cannot be stunned for ms after stun finished [2000] cannot be stunned while stunned [1]	Y
Piety the Empyrean	15000% increased Rarity of Items Dropped Monsters grant 100% increased Experience 65% reduced Energy Shield Recharge Rate cannot be stunned for ms after stun finished [2000] cannot be stunned while stunned [1]	Y
Minara Anemina	monster base type attack cast speed +% and damage -% final [33] 30% Chance to Block Spell Damage You take 15% of Damage from Blocked Hits	Y
Minara Anemina	monster base type attack cast speed +% and damage -% final [33] 30% Chance to Block Spell Damage You take 15% of Damage from Blocked Hits 100% increased maximum Life 100% increased Area of Effect 80% increased Character Size	Y
Minara Anemina	monster base type attack cast speed +% and damage -% final [33] monster no map drops [1] 30% Chance to Block Spell Damage You take 15% of Damage from Blocked Hits	Y
Shrine Daemon		Y
The All-seeing Eye	% increased Rarity of Items Dropped monster additional quantity of dropped items in cruel +% [300] monster additional quantity of dropped items in merciless +% [600] monster additional rarity of dropped items in cruel +% [300] monster additional rarity of dropped items in merciless +% [600] monster no map drops [1]	Y
The All-seeing Eye	% increased Rarity of Items Dropped monster no map drops [1]	Y
The All-seeing Eye	% increased Rarity of Items Dropped monster additional quantity of dropped items in cruel +% [300] monster additional quantity of dropped items in merciless +% [600] monster additional rarity of dropped items in cruel +% [300] monster additional rarity of dropped items in merciless +% [600] monster no map drops [1] monster is invasion boss [1]	Y
Scale of Esh	grant actor scale +% to aura owner on death [2] grant attack speed +% to aura owner on death [5] grant cast speed +% to aura owner on death [5] grant damage reduction % to aura owner on death [-2] soul is consumed on death [1] monster beyond portal chance +% final [-66] monster hellscape charge +% [-66]	Y
Scale of Esh	grant actor scale +% to aura owner on death [2] grant attack speed +% to aura owner on death [5] grant cast speed +% to aura owner on death [5] grant damage reduction % to aura owner on death [-2] soul is consumed on death [1]	Y
Scale of Esh	monster beyond portal chance +% final [-66] monster hellscape charge +% [-66] monster no map drops [1]	Y
Scale of Esh	monster beyond portal chance +% final [-66] monster hellscape charge +% [-66]	Y
Scale of Esh		Y
Scale of Esh	monster no drops or experience [1] cannot be used as minion [1]	N
Tome of Thunder		Y
Scale of Esh	grant actor scale +% to aura owner on death [2] grant attack speed +% to aura owner on death [5] grant cast speed +% to aura owner on death [5] grant damage reduction % to aura owner on death [-2] soul is consumed on death [1] cannot be used as minion [1] monster beyond portal chance +% final [-66] monster hellscape charge +% [-66]	N
Scale of Esh	cannot be used as minion [1] monster beyond portal chance +% final [-66] monster hellscape charge +% [-66] monster no map drops [1]	N
Refinery Construct	display monster mod nemesis test [0]	Y
Refinery Shocker	display monster mod nemesis test [0]	Y
Mine Construct	display monster mod nemesis test [0]	Y
Syndicate Conduit	monster do not fracture [1]	Y
Arc Tower	blight tower damage +% final vs lightning monster [-99]	Y
Blighted Arcmage	20% Chance to Block Spell Damage You take 10% of Damage from Blocked Hits	Y
Eden, Blightspeaker	20% Chance to Block Spell Damage You take 10% of Damage from Blocked Hits 1500% increased Quantity of Items Dropped 2000% increased Rarity of Items Dropped Monsters grant 100% increased Experience Cannot be Knocked Back	Y
Ravenous Misshapen		Y

Microtransactions /4 ⍟

Purple Arc

Your Arc becomes a Purple Effect.

Automaton Arc Effect

Your Arc becomes an Automaton Effect.

Radiant Arc Effect

Your Arc becomes a Radiant Effect.

Celestial Arc Effect

Your Arc becomes a Celestial Effect.

Labyrinth Enchantment helmet /33 ⍟

Level	Name	Mod	Weight
The Merciless Labyrinth	Enchantment Ancestral Warchief Damage 1	25% increased Ancestral Warchief Totem Damage	100
The Eternal Labyrinth	Enchantment Ancestral Warchief Damage 2	40% increased Ancestral Warchief Totem Damage	100
The Merciless Labyrinth	Enchantment Arc Damage 1	25% increased Arc Damage	100
The Eternal Labyrinth	Enchantment Arc Damage 2	40% increased Arc Damage	75
The Merciless Labyrinth	Enchantment Creeping Frost Damage 1	25% increased Creeping Frost Damage	100
The Eternal Labyrinth	Enchantment Creeping Frost Damage 2	40% increased Creeping Frost Damage	75
The Merciless Labyrinth		Arc Chains an additional time
The Eternal Labyrinth	Enchantment Arc Num Of Additional Projectiles In Chain 1	Arc Chains an additional time	75
The Merciless Labyrinth	Enchantment Arc Shock Chance 1	Arc has +20% chance to Shock	100
The Eternal Labyrinth	Enchantment Arc Shock Chance 2	Arc has +30% chance to Shock	75
The Merciless Labyrinth	Enchantment Arc Damage Per Chain 1	Arc deals 8% increased Damage for each time it has Chained	100
The Eternal Labyrinth	Enchantment Arc Damage Per Chain 2	Arc deals 12% increased Damage for each time it has Chained	75
The Merciless Labyrinth	Enchantment Arcane Cloak Additional Mana Spent 1	Arcane Cloak Spends an additional 10% of current Mana	100
The Eternal Labyrinth	Enchantment Arcane Cloak Additional Mana Spent 2	Arcane Cloak Spends an additional 15% of current Mana	100
The Eternal Labyrinth	Enchantment Arcane Cloak Grants Life Regeneration 1	Arcane Cloak grants Life Regeneration equal to 15% of Mana Spent per Second	100
The Merciless Labyrinth	Enchantment Ancestor Warchief Area Of Effect 1	16% increased Ancestral Warchief Totem Area of Effect	100
The Eternal Labyrinth	Enchantment Ancestor Warchief Area Of Effect 2	24% increased Ancestral Warchief Totem Area of Effect	100
The Merciless Labyrinth	Enchantment Ancestor Warchief Melee Damage 1	Ancestral Warchief Totem grants 20% increased Melee Damage while Active	100
The Eternal Labyrinth	Enchantment Ancestor Warchief Melee Damage 2	Ancestral Warchief Totem grants 30% increased Melee Damage while Active	100
The Merciless Labyrinth	Enchantment Arctic Armour Buff Effect 1	24% increased Arctic Armour Buff Effect
The Eternal Labyrinth	Enchantment Arctic Armour Buff Effect 2	36% increased Arctic Armour Buff Effect
The Merciless Labyrinth	Enchantment Arctic Armour Mana Reservation 1	Arctic Armour has 40% increased Mana Reservation Efficiency
The Eternal Labyrinth	Enchantment Arctic Armour Mana Reservation 2	Arctic Armour has 60% increased Mana Reservation Efficiency
The Merciless Labyrinth	Enchantment Arctic Armour Mana Reservation 1	Arctic Armour has 50% increased Mana Reservation Efficiency	100
The Eternal Labyrinth	Enchantment Arctic Armour Mana Reservation 2	Arctic Armour has 75% increased Mana Reservation Efficiency	100
The Merciless Labyrinth	Enchantment Creeping Frost Duration 1	24% increased Creeping Frost Duration	100
The Eternal Labyrinth	Enchantment Creeping Frost Duration 2	36% increased Creeping Frost Duration	75
The Merciless Labyrinth	Enchantment Creeping Frost Area Of Effect 1	16% increased Creeping Frost Area of Effect	100
The Eternal Labyrinth	Enchantment Creeping Frost Area Of Effect 2	24% increased Creeping Frost Area of Effect	75
The Eternal Labyrinth	Enchantment Creeping Frost Chilling Area Movement Velocity 1	Creeping Frost's Chilling Area has 38% increased Movement Speed	75
The Merciless Labyrinth	Enchantment Arcanist Brand Cast Speed 1	Arcanist Brand has 8% increased Cast Speed	100
The Eternal Labyrinth	Enchantment Arcanist Brand Cast Speed 2	Arcanist Brand has 12% increased Cast Speed	100
The Eternal Labyrinth	Enchantment Arcanist Brand Unnerve 1	Spells Triggered by Arcanist Brand Unnerve enemies on Hit for 4 seconds	100

Supported By /85 ⍟

Active Type: Spell, Damage, Trappable, Totemable, Mineable, Chains, Multicastable, Triggerable, Lightning, CanRapidFire

Icon	Name
	Added Fire Damage Support Supports any skill that hits enemies.
	Added Cold Damage Support Supports any skill that hits enemies.
	Added Lightning Damage Support Supports any skill that hits enemies.
	Increased Critical Strikes Support Supports any skill that hits enemies.
	Increased Critical Damage Support Supports any skill that hits enemies.
	Knockback Support Supports any skill that hits enemies.
	Life Leech Support Supports any skill that hits enemies, causing those hits to leech life based on damage dealt.
	Added Chaos Damage Support Supports any skill that hits enemies.
	Stun Support Supports any skill that hits enemies, making it easier to stun enemies with those skills.
	Trap Support Supports spells, or attacks that use bows or wands. Instead of using that skill, you will throw a trap that will use the skill for you when an enemy walks near it. Traps cannot use channelling skills.
	Item Rarity Support Supports any skill that can kill enemies.
	Faster Casting Support Supports non-instant spell skills.
	Cold to Fire Support Supports any skill that hits enemies.
	Combustion Support Supports any skill that hits enemies.
	Elemental Proliferation Support Supports any skill that hits enemies, or could otherwise apply elemental ailments.
	Culling Strike Support Supports any skill that hits enemies. If enemies are left below 10% of maximum life after being hit by these skills, they will be killed.
	Iron Will Support Supports spell skills, making the increase to physical melee damage from strength also increase their spell damage.
	Spell Totem Support Supports spell skills that are not triggered. Instead of casting that spell, you will summon a totem that casts the spell for you.
	Blastchain Mine Support Supports spells, or attacks that use bows or wands. Instead of using that skill, you will throw a mine that will use the skill for you when you detonate it. Mines cannot use channelling skills.
	Chance to Flee Support Supports any skill that hits enemies.
	Blind Support Supports any skill that hits enemies.
	Fire Penetration Support Supports any skill that hits enemies, making those hits penetrate enemy fire resistance.
	Cold Penetration Support Supports any skill that hits enemies, making those hits penetrate enemy cold resistance.
	Lightning Penetration Support Supports any skill that hits enemies, making those hits penetrate enemy lightning resistance.
	Elemental Penetration Support Supports any skill that hits enemies, making those hits penetrate enemy elemental resistances.
	Chain Support Supports projectile skills, and any other skills that chain.
	Spell Echo Support Supports spell skills, making them repeat when cast. Cannot support Vaal skills, totem skills, channelling skills, triggered skills, instant skills, blink skills, or skills with a reservation.
	Power Charge On Critical Support Supports any skill that hits enemies.
	Burning Damage Support Supports any skill that hits enemies, or can deal burning damage directly.
	Hextouch Support Must support both a skill that hits enemies, and a hex curse skill to work. The hex will be applied when enemies are hit by the other skill. Cannot support totems, traps, or mines. Minions cannot apply hexes this way.
	Cast on Death Support Each supported spell skill will be triggered when you die. Cannot support skills used by totems, traps, or mines. Vaal skills, channelling skills, and skills with a reservation cannot be triggered.
	Cast when Damage Taken Support Each supported spell skill will track damage you take, and be triggered when the total damage taken reaches a threshold. Cannot support skills used by totems, traps, or mines. Vaal skills, channelling skills, and skills with a reservation cannot be triggered.
	Cast when Stunned Support Each supported spell skill will have a chance to be triggered when you are stunned. Cannot support skills used by totems, traps, or mines. Vaal skills, channelling skills, and skills with a reservation cannot be triggered.
	Block Chance Reduction Support Supports any skill that hits enemies.
	Physical to Lightning Support Supports any skill that hits enemies.
	Ice Bite Support Supports any skill you use to hit enemies yourself. Cannot support skills used by totems, traps, or mines.
	Hypothermia Support Supports any skill that deals damage.
	Innervate Support Supports any skill you use to hit enemies yourself. Cannot support skills used by totems, traps, or mines.
	Critical Strike Affliction Support Supports any skill that hits enemies.
	Void Manipulation Support Supports any skill that deals damage.
	Controlled Destruction Support Supports attack skills, or spell skills that deal damage.
	Swift Affliction Support Supports any skill that has a duration, or can hit enemies to inflict ailments on them.
	Elemental Focus Support Supports any skill that hits or burns enemies, or inflicts elemental ailments.
	Ignite Proliferation Support Supports any skill that hits enemies.
	Chance to Poison Support Supports any skill that hits enemies.
	Deadly Ailments Support Supports any skill that hits enemies.
	Decay Support Supports any skill that hits enemies.
	Efficacy Support Supports any skill that deals damage or has a duration.
	Vile Toxins Support Supports any skill that hits enemies.
	Immolate Support Supports any skill that hits enemies.
	Unbound Ailments Support Supports any skill that hits enemies or inflicts ailments
	Brutality Support Supports any skill that deals damage.
	Arcane Surge Support Each supported spell will track how much mana you spend on it, granting a buff when the total mana spent reaches a threshold. Cannot support skills used by totems, traps, mines or skills with a reservation.
	Summon Phantasm Support Supports skills that can hit enemies, or create minions. When those skills or minions kill enemies, or hit rare or unique enemies they will have a chance to summon a Phantasm minion, which uses a piercing projectile spell that deals physical damage.
	Bonechill Support Supports any skill that can chill enemies or create chilling areas.
	Energy Leech Support Supports any skill that hits enemies, causing those hits to leech energy shield based on damage dealt.
	Unleash Support Supports spell skills, making their effect reoccur when cast. Cannot support skills with cooldowns, triggered skills, Brand skills, Vaal skills, channelling skills, skills with a reservation, or skills used by totems, traps, or mines. Cannot modify the skills of minions.
	High-Impact Mine Support Supports spells, or attacks that use bows or wands. Instead of using that skill, you will throw a mine that will use the skill for you when you detonate it. Mines cannot use channelling skills.
	Awakened Added Fire Damage Support Supports any skill that hits enemies.
	Awakened Brutality Support Supports any skill that deals damage.
	Awakened Burning Damage Support Supports any skill that hits enemies, or can deal burning damage directly.
	Awakened Fire Penetration Support Supports any skill that hits enemies, making those hits penetrate enemy fire resistance.
	Awakened Added Cold Damage Support Supports any skill that hits enemies.
	Awakened Chain Support Supports projectile skills, and any other skills that chain.
	Awakened Cold Penetration Support Supports any skill that hits enemies, making those hits penetrate enemy cold resistance.
	Awakened Deadly Ailments Support Supports any skill that hits enemies.
	Awakened Swift Affliction Support Supports any skill that has a duration, or can hit enemies to inflict ailments on them.
	Awakened Void Manipulation Support Supports any skill that deals damage.
	Awakened Added Chaos Damage Support Supports any skill that hits enemies.
	Awakened Added Lightning Damage Support Supports any skill that hits enemies.
	Awakened Controlled Destruction Support Supports attack skills, or spell skills that deal damage.
	Awakened Hextouch Support Must support both a skill that hits enemies, and a hex curse skill to work. The hex will be applied when enemies are hit by the other skill. Cannot support totems, traps, or mines. Minions cannot apply hexes this way.
	Awakened Elemental Focus Support Supports any skill that hits or burns enemies, or inflicts elemental ailments.
	Awakened Lightning Penetration Support Supports any skill that hits enemies, making those hits penetrate enemy lightning resistance.
	Awakened Spell Echo Support Supports spell skills, making them repeat when cast. Cannot support Vaal skills, totem skills, channelling skills, triggered skills, instant skills, blink skills, or skills with a reservation.
	Awakened Unbound Ailments Support Supports any skill that hits enemies or inflicts ailments
	Awakened Unleash Support Supports spell skills, making their effect reoccur when cast. Cannot support skills with cooldowns, triggered skills, Brand skills, Vaal skills, channelling skills, skills with a reservation, or skills used by totems, traps, or mines. Cannot modify the skills of minions.
	Archmage Support Supports spell skills that deal damage with hits and have no reservation. Cannot support arcane skills, Brand skills, Orb skills, Vaal skills, or skills used by totems, traps or mines. Cannot modify the skills of minions.
	Trinity Support Supports skills that hit enemies, causing them to gain bonuses while you have resonance of all three elements, and to grant resonance of elements other than the highest one in a hit. There is a maximum of 50 Resonance for each Element. Cannot support triggered skills, instant skills, orb skills, brands, skills with a reservation, or skills used by totems, traps, or mines. Cannot modify the skills of minions.
	Cruelty Support Supports any skill that hits enemies. Minions cannot gain Cruelty.
	Overcharge Support Supports any skill that hits enemies.
	Spellblade Support Supports spells that hit enemies. Cannot modify the skills of minions.
	Devour Support Supports any skill that hits enemies.
	Sacrifice Support Supports spell skills that hit enemies and have no reservation. Cannot support brand skills, orb skills, channelling skills, Vaal skills or skills used by traps or mines. Cannot modify the skills of minions.
	Sadism Support Supports any skill that hits enemies.

Community Wiki

Edit

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 Support 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.

Version history

Version	Changes
3.17.0	Arc now deals 6 to 32 Lightning Damage at gem level 1 (previously 6 to 33), up to 198 to 1122 at gem level 20 (previously 133 to 754). Now has 120% Effectiveness of Added Damage at all gem levels (previously 80%).
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	Arc and Vaal Arc 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.

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