Purity of Lightning

For the Vaal-themed counterpart, see Vaal Impurity of Lightning.

Purity of Lightning is an aura skill that grants lightning resistance and maximum lightning resistance to the caster and nearby allies.

Skill functions and interactions

Both the additional lightning resistance and additional maximum lightning resistance are affected by increased aura effect.

The following x% increase in aura effect are needed to receive a higher amount of max resistances. +5% max resistance are gained by a lvl 23 version of the aura.

Aura Bonus/ Actual Bonus	+5% max	+6% max	+7% max	+8% max	+9% max	+10% max	+11% max	+12% max	+13% max	+14% max	+15% max
+4% max	25%	50%	75%	100%	125%	150%	175%	200%	225%	250%	275%
+5% max	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	200%

The passive tree can provide 69% aura effect which requires heavy point investment though. The Champion Duelist class can have an additional 20% effect, the Guardian Templar class can have an additional 10% effect, and the Necromancer Witch class an additional 5%. can provide another 3% effect. Through the use of with its lvl 30 and up to 15% increased effect mod, an additional 64% increased aura effect can be obtained. However, supported auras will not affect you.
If the player equips a , an additional 18% effect can be achieved at the cost of a shield (such as ) and weapon (such as or ). Additionally, the player can equip amulet for up to an additional 15% increased effect.
The table below shows the highest aura effect each ascendancy can achieve.

Ascendancy	Aura Effect
Champion	189%
Guardian	179%
Necromancer	174%
Other	169%

See the aura page for more details.

Gem level progression

Level			Lightning Resistance	Radius	max. Lightning Resistance	Exp.	Total Exp.
1	24	58	22%	N/A	N/A	0	0
2	27	64	23%	+1	N/A	118383	118383
3	30	71	24%	+2	N/A	175816	294199
4	33	77	25%	+3	N/A	254061	548260
5	36	83	26%	+4	1%	359090	907350
6	39	90	27%	+5	1%	498508	1405858
7	42	96	28%	+6	1%	682057	2087915
8	45	102	29%	+7	1%	921777	3009692
9	48	109	30%	+8	1%	1727879	4737571
10	50	113	31%	+9	1%	1138877	5876448
11	52	117	32%	+10	2%	1368233	7244681
12	54	121	33%	+11	2%	1638338	8883019
13	56	125	34%	+12	2%	1956648	10839667
14	58	130	35%	+13	2%	3655184	14494851
15	60	134	36%	+14	2%	3017327	17512178
16	62	138	37%	+15	2%	7793914	25306092
17	64	142	38%	+16	3%	15206031	40512123
18	66	146	39%	+17	3%	26185582	66697705
19	68	151	40%	+18	3%	62755923	129453628
20	70	155	41%	+19	4%	211877683	341331311
21	72	159	42%	+20	4%	N/A	N/A
22	74	N/A	43%	+21	4%	N/A	N/A
23	76	N/A	44%	+22	5%	N/A	N/A
24	78	N/A	45%	+23	5%	N/A	N/A
25	80	N/A	46%	+24	5%	N/A	N/A
26	82	N/A	47%	+25	5%	N/A	N/A
27	84	N/A	48%	+26	5%	N/A	N/A
28	86	N/A	49%	+27	5%	N/A	N/A
29	88	N/A	50%	+28	5%	N/A	N/A
30	90	N/A	51%	+29	5%	N/A	N/A
31	91	N/A	51%	+29	5%	N/A	N/A
32	92	N/A	52%	+30	5%	N/A	N/A
33	93	N/A	52%	+30	5%	N/A	N/A
34	94	N/A	53%	+31	5%	N/A	N/A
35	95	N/A	53%	+31	5%	N/A	N/A
36	96	N/A	54%	+32	5%	N/A	N/A
37	97	N/A	54%	+32	5%	N/A	N/A
38	98	N/A	55%	+33	5%	N/A	N/A
39	99	N/A	55%	+33	5%	N/A	N/A
40	100	N/A	56%	+34	5%	N/A	N/A

Related helmet enchantments

The following helmet enchantments affect Purity of Lightning.

Related unique items

The following unique items are related to Purity of Lightning:

Related passive skills

The following passive skills are related to Purity of Lightning:

Related modifiers

The following modifiers are related to Purity of Lightning:

These Synthesis implicit currently only able to find in presynthesized item or added via Harvest mechanics:

Legacy mods

The following mods can only be find in legacy item in permanent leagues:

Alternate skill effects

Purity of Lightning has the following alternate skill effects:

Version history

Version	Changes
3.13.0	Anomalous Purity of Lightning now grants you and nearby allies 0.25% chance to avoid being shocked per 1% gem quality (from 1% per 1% gem quality). Divergent Purity of Lightning now causes your damage and that of nearby allies to penetrate 0.05% of lightning resistance per 1% gem quality (from 0.2% per 1% gem quality).
3.12.0	Now has alternative gem quality: Anomalous and Divergent.
3.4.0	Now instant by default and can therefore be used while moving. All instant skills now have cooldown 1 second or less. Instant skills cannot be supported by Spell Echo and will not be cast a second time by similar effects (such as from the Echoing Shrine).
1.0.1	Purity of Lightning has been added to the game.