Vaal Arc

For the non-Vaal counterpart, see Arc.

Vaal Arc is a vaal spell that launches a chaining lightning arc at the target that lasts until no valid target remains or all chains are used up.

Skill Functions and Interactions

Although Vaal Arc chains, it is similar to Arc in that it's not a projectile and therefore does not benefit from projectile-specific modifiers on gear, passives and skill gems.

Gem level progression

Level			Lightning Damage	# Chains	Exp.	Total Exp.
1	12	33	38 to 64	5	0	0
2	15	39	48 to 80	5	15249	15249
3	19	48	64 to 106	5	41517	56766
4	23	56	83 to 138	5	81983	138749
5	27	64	105 to 176	6	147968	286717
6	31	73	133 to 222	6	250557	537274
7	35	81	166 to 277	6	405086	942360
8	38	88	196 to 326	6	447718	1390078
9	41	94	229 to 382	7	615318	2005396
10	44	100	268 to 446	7	834639	2840035
11	47	106	312 to 519	7	1570760	4410795
12	50	113	362 to 603	7	1633987	6044782
13	53	119	419 to 698	8	2151030	8195812
14	56	125	483 to 806	8	2812189	11008001
15	59	132	557 to 929	8	5099360	16107361
16	62	138	641 to 1068	8	9400731	25508092
17	64	142	703 to 1172	9	15273366	40781458
18	66	146	770 to 1284	9	26286582	67068040
19	68	151	844 to 1406	9	62890590	129958630
20	70	155	924 to 1539	9	212046017	342004647
21	72	159	1010 to 1684	10	N/A	N/A
22	74	N/A	1104 to 1841	10	N/A	N/A
23	76	N/A	1207 to 2011	10	N/A	N/A
24	78	N/A	1318 to 2196	10	N/A	N/A
25	80	N/A	1438 to 2397	11	N/A	N/A
26	82	N/A	1569 to 2614	11	N/A	N/A
27	84	N/A	1710 to 2851	11	N/A	N/A
28	86	N/A	1864 to 3107	11	N/A	N/A
29	88	N/A	2031 to 3384	12	N/A	N/A
30	90	N/A	2211 to 3685	12	N/A	N/A
31	91	N/A	2307 to 3845	12	N/A	N/A
32	92	N/A	2407 to 4011	12	N/A	N/A
33	93	N/A	2511 to 4184	12	N/A	N/A
34	94	N/A	2619 to 4365	12	N/A	N/A
35	95	N/A	2731 to 4552	12	N/A	N/A
36	96	N/A	2848 to 4747	13	N/A	N/A
37	97	N/A	2970 to 4950	13	N/A	N/A
38	98	N/A	3097 to 5161	13	N/A	N/A
39	99	N/A	3229 to 5381	13	N/A	N/A
40	100	N/A	3366 to 5610	13	N/A	N/A

Alternate skill effects

Vaal Arc has the following alternate skill effects:

Version history

Version	Changes
3.14.0	No longer causes Modifiers to Buff Duration to also apply to this Skill's Soul Gain Prevention. Now has a Cast Time of 0.7 seconds (previously 0.8). Now has a Soul Gain Prevention duration of 2 seconds (previously 6).
3.3.0	Previously chained +40 times. Now deals 38-64 lightning damage at gem level 1 (up from 2-35), up to 924-1539 lightning damage at gem level 20 (up from 49-939) Now requires 25 souls per use (down from 32). Now deals 15% more damage for each remaining chain. Now increases shock duration by 100%. Now increases the effect of shock by 100%. Now chains 5 times, but each chain can split to another enemy (from which it can also chain). This number grows as it levels. Now causes your Arc damage to be lucky for 4 seconds. Now has an added damage effectiveness of 180% (up from 80%). Now prevents you from gaining Vaal souls for 4 seconds after use.
2.0.0	Now has 100% chance to Shock (up from 10%). Now gains 1.5% increased Shock Duration per Quality.
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.
1.1.0d	Vaal Skill soul counts were initially balanced for Merciless difficulty, where there are more monsters. We want them to be easier to use in Normal and Cruel difficulty. We have halved the number of souls required for each skill. In Cruel difficulty, skills require 50% more souls to uses. In Merciless difficulty, they require 100% more (which is the same as before the patch).
1.1.0	Introduced to the game.