Arc

For the Vaal-themed counterpart, see Vaal Arc.

Arc is a lightning spell that creates a chaining pulse.

Skill functions and interactions

• Since it is not a projectile, Arc cannot or , and it cannot be supported with or Multiple Projectiles. Supporting Arc with 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

Level			Mana Cost	Lightning Damage	# Chains	Shock Effect	Exp.	Total Exp.
1	12	33	8	6 to 32	4	N/A	0	0
2	15	39	9	7 to 41	4	N/A	15249	15249
3	19	48	10	10 to 56	4	N/A	41517	56766
4	23	56	11	13 to 75	4	N/A	81983	138749
5	27	64	12	17 to 98	4	N/A	147968	286717
6	31	73	13	22 to 127	5	N/A	250557	537274
7	35	81	14	29 to 162	5	N/A	405086	942360
8	38	88	15	34 to 194	5	N/A	447718	1390078
9	41	94	16	41 to 232	5	N/A	615318	2005396
10	44	100	16	49 to 276	5	N/A	834639	2840035
11	47	106	17	58 to 327	6	N/A	1570760	4410795
12	50	113	18	68 to 387	6	N/A	1633987	6044782
13	53	119	19	81 to 457	6	N/A	2151030	8195812
14	56	125	19	95 to 538	6	N/A	2812189	11008001
15	59	132	20	111 to 631	6	N/A	5099360	16107361
16	62	138	21	131 to 740	7	N/A	9400731	25508092
17	64	142	21	145 to 822	7	N/A	15273366	40781458
18	66	146	22	161 to 912	7	N/A	26286582	67068040
19	68	151	22	179 to 1012	7	N/A	62890590	129958630
20	70	155	23	198 to 1122	7	N/A	212046017	342004647
21	72	159	24	219 to 1242	8	N/A	N/A	N/A
22	74	N/A	24	243 to 1375	8	N/A	N/A	N/A
23	76	N/A	25	269 to 1522	8	N/A	N/A	N/A
24	78	N/A	25	297 to 1683	8	N/A	N/A	N/A
25	80	N/A	26	328 to 1859	8	N/A	N/A	N/A
26	82	N/A	26	362 to 2054	9	N/A	N/A	N/A
27	84	N/A	27	400 to 2268	9	N/A	N/A	N/A
28	86	N/A	27	442 to 2503	9	N/A	N/A	N/A
29	88	N/A	28	487 to 2761	9	N/A	N/A	N/A
30	90	N/A	28	537 to 3044	9	N/A	N/A	N/A
31	91	N/A	28	564 to 3196	10	N/A	N/A	N/A
32	92	N/A	29	592 to 3356	10	N/A	N/A	N/A
33	93	N/A	29	622 to 3522	10	N/A	N/A	N/A
34	94	N/A	29	652 to 3697	10	N/A	N/A	N/A
35	95	N/A	29	685 to 3880	10	N/A	N/A	N/A
36	96	N/A	30	719 to 4072	11	N/A	N/A	N/A
37	97	N/A	30	754 to 4273	11	N/A	N/A	N/A
38	98	N/A	30	791 to 4483	11	N/A	N/A	N/A
39	99	N/A	30	830 to 4703	11	N/A	N/A	N/A
40	100	N/A	31	871 to 4934	11	N/A	N/A	N/A

Related helmet enchantments

The following helmet enchantments affect Arc.

Note that helmet enchantments are no longer obtainable since version 3.23.0 and can only be obtained in permanent leagues as already enchanted items from before this patch.

Name		Labyrinth	Stats	Spawn Weighting
Enchantment Arc Damage 1	66	Merciless Labyrinth	25% increased Arc Damage	helmet 100
Enchantment Arc Damage 2	75	Eternal Labyrinth	40% increased Arc Damage	helmet 75
Enchantment Arc Damage Per Chain 1	66	Merciless Labyrinth	Arc deals 8% increased Damage for each time it has Chained	helmet 100
Enchantment Arc Damage Per Chain 2	75	Eternal Labyrinth	Arc deals 12% increased Damage for each time it has Chained	helmet 75
EnchantmentArcNumOfAdditionalProjectilesInChain1	66	Merciless Labyrinth	Arc Chains an additional time	helmet 0
Enchantment Arc Num Of Additional Projectiles In Chain 1	75	Eternal Labyrinth	Arc Chains an additional time	helmet 75
Enchantment Arc Shock Chance 1	66	Merciless Labyrinth	Arc has +20% chance to Shock	helmet 100
Enchantment Arc Shock Chance 2	75	Eternal Labyrinth	Arc has +30% chance to Shock	helmet 75

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	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.