Storm Burst

Storm BurstAoE, Spell, Lightning, Channelling, Duration, Physical
Mana Cost: (2-5)
Cast Time: 0.25 sec
Critical Strike Chance: 6.00%
Effectiveness of Added Damage: 25%Requires Level 12Unleash orbs of energy while you channel that repeatedly jump towards the targeted location until their duration expires, dealing damage in small area after each jump. When you stop channelling, all remaining orbs explode, dealing higher damage in a larger area.Per 1% Quality:
0.5% increased Area of EffectDeals (6-114) to (8-171) Physical Damage
Exploding Orbs deal 75% of Skill Damage for each 0.4 seconds of remaining Duration
50% of Physical Damage Converted to Lightning Damage
Orbs jump every 0.4 seconds
+(0-2) to radiusPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.Acquisition
Level: 12Purchase Costs

Normal

1x Orb of Transmutation

Sell Price
1x Scroll FragmentMiscellaneous
Item class: Active Skill Gems
Metadata ID: Metadata/Items/Gems/SkillGemStormBurst

Storm Burst is an active skill gem that unleashes orbs of energy while channelling. The orbs jump towards (or if targeting a nearby area, around) the targeted location and deal lightning damage to enemies.

Skill function and interaction

Channelling Storm Burst creates a cluster of pulsing orbs that follow the mouse pointer. Enemies can be hit by multiple orbs, but the orbs spawn in a spread out pattern resembling buckshot. With proper Area of Effect boosting, an enemy will be damaged by most if not all orbs greatly enhancing Storm Burst's single target damage.

Every 0.4 seconds all orbs move toward the mouse pointer and perform a damage pulse, until they expire or until channelling is stopped, at which point all orbs explode, dealing 75% of their remaining damage potential.

The number of hits with Storm Burst scales with Cast Speed, Spell Duration and Area of Effect range. While at low level just 2 out of 5 orbs may hit one enemy, at high level all of the 25+ orbs may connect with each and every enemy. Because of the many hits per second Storm Burst will apply the Shock Ailment. The tooltip does not account for these effects, greatly understating the endgame damage of Storm Burst.

Storm Burst's understated tooltip, capable of instantly knocking out über Izaro

Storm Burst is primarily is a Physical Damage spell, with baked-in 50% damage conversion to Lightning Damage. This makes Storm Burst a good levelling spell versus Act Bosses with elemental resistance.

Gem level progression

Level				Mana Cost	Physical Damage	Added Radius	Exp.	Total Exp.
1	12	14	21	2	6 to 8	N/A	0	0
2	15	17	25	2	7 to 10	N/A	15,249	15,249
3	19	21	30	2	9 to 14	N/A	41,517	56,766
4	23	24	35	3	12 to 17	N/A	81,983	138,749
5	27	28	41	3	15 to 22	N/A	147,968	286,717
6	31	32	46	3	18 to 27	N/A	250,557	537,274
7	35	36	51	3	23 to 34	1	405,086	942,360
8	38	38	55	3	26 to 40	1	447,718	1,390,078
9	41	41	59	4	31 to 46	1	615,318	2,005,396
10	44	44	63	4	35 to 53	1	834,639	2,840,035
11	47	47	67	4	41 to 61	1	1,570,760	4,410,795
12	50	49	71	4	47 to 71	1	1,633,987	6,044,782
13	53	52	75	4	54 to 81	1	2,151,030	8,195,812
14	56	55	79	5	62 to 93	2	2,812,189	11,008,001
15	59	58	83	5	71 to 106	2	5,099,360	16,107,361
16	62	60	87	5	81 to 121	2	9,400,731	25,508,092
17	64	62	90	5	88 to 132	2	15,273,366	40,781,458
18	66	64	92	5	96 to 144	2	26,286,582	67,068,040
19	68	66	95	5	105 to 157	2	62,890,590	129,958,630
20	70	68	98	5	114 to 171	2	212,046,017	342,004,647
21	72	70	100	5	124 to 186	3	N/A	N/A
22	74	N/A	N/A	6	135 to 202	3	N/A	N/A
23	76	N/A	N/A	6	146 to 219	3	N/A	N/A
24	78	N/A	N/A	6	159 to 238	3	N/A	N/A
25	80	N/A	N/A	6	172 to 258	3	N/A	N/A
26	82	N/A	N/A	6	187 to 280	3	N/A	N/A
27	84	N/A	N/A	6	203 to 304	3	N/A	N/A
28	86	N/A	N/A	6	220 to 329	4	N/A	N/A
29	88	N/A	N/A	6	238 to 357	4	N/A	N/A
30	90	N/A	N/A	7	257 to 386	4	N/A	N/A
31	91	N/A	N/A	7	268 to 402	4	N/A	N/A
32	92	N/A	N/A	7	279 to 418	4	N/A	N/A
33	93	N/A	N/A	7	290 to 435	4	N/A	N/A
34	94	N/A	N/A	7	302 to 452	4	N/A	N/A
35	95	N/A	N/A	7	314 to 470	4	N/A	N/A
36	96	N/A	N/A	7	326 to 489	4	N/A	N/A
37	97	N/A	N/A	7	339 to 509	4	N/A	N/A
38	98	N/A	N/A	7	353 to 529	4	N/A	N/A
39	99	N/A	N/A	7	367 to 550	4	N/A	N/A
40	100	N/A	N/A	7	381 to 572	5	N/A	N/A

Item acquisition

Upgrade paths

This item can be acquired through the following upgrade paths or vendor recipes:

Amount	Ingredient	General Notes	Type
6	The FoxThe Fox6Level 20 Gem"Masters of wit, strength and cunning. To survive the harsh winters, you must be like the fox." - Ezomyte Proverb	random level 20 gem	Automatic
13	The CataclysmThe Cataclysm13Level 21 Spell Gem CorruptedThe mighty warriors traded in blows, the nimble archers in arrows, yet it was the brazen thaumaturgists who would bring catastrophe to all.	random corrupted level 21 Spell gem	Automatic
3	Gemcutter's PromiseGemcutter's Promise3Superior Gem Quality: +20%"I swore to use my position to help the people. What good is power when it just accumulates on the already-powerful?" - Erasmus, Imperial Gemcutter	random superior gem (Q20)	Automatic

Quest reward

This item is given as quest reward for the following quests:

Class →	Witch	Shadow	Ranger	Duelist	Marauder	Templar	Scion
Quest ↓
The Siren's Cadence Act 1	✓	✗	✗	✗	✗	✓	✓

Vendor reward

This item can be bought at the listed npc vendors after completing the following quests:

Class →	Witch	Shadow	Ranger	Duelist	Marauder	Templar	Scion
Quest ↓
The Siren's Cadence Act 1 Nessa	✓	✓	✗	✗	✗	✓	✓
A Fixture of Fate Act 3 Siosa	✓
Fallen from Grace Act 6 Lilly Roth	✓

Related helmet enchantments

The following helmet enchantments affect Storm Burst.

Name		Stats	Spawn Weighting
Enchantment Storm Burst Additional Object Chance 1	66	Storm Burst has a 10% chance to create an additional Orb	helmet 100 default 0
Enchantment Storm Burst Additional Object Chance 2	75	Storm Burst has a 15% chance to create an additional Orb	helmet 100 default 0
Enchantment Storm Burst Damage 1	66	25% increased Storm Burst Damage	helmet 100 default 0
Enchantment Storm Burst Damage 2	75	40% increased Storm Burst Damage	helmet 100 default 0
Enchantment Storm Burst Area Of Effect 1	66	8% increased Storm Burst Area of Effect	helmet 100 default 0
Enchantment Storm Burst Area Of Effect 2	75	12% increased Storm Burst Area of Effect	helmet 100 default 0

Version history

Version	Changes
3.6.3d	Storm Burst's tooltip now displays the frequency at which Orbs jump and the duration of Orbs.
3.6.0	No longer fires projectiles. Now creates orbs of energy while you channel that repeatedly jump towards the targeted location until their duration expires, dealing damage in small area after each jump. When you stop channelling, all remaining orbs explode, dealing higher damage in a larger area. This explosion deals more damage based on how much duration remains at the point you stop channeling [sic]. Now has a cast time of 0.25 seconds (from 0.65). Mana cost at gem level 1 is now 2 (was 4). Mana cost at gem level 20 is now 5 (was 10). Now deals Physical Damage, and converts 50% of Physical Damage to Lightning Damage. Now requires level 12 (from level 28). Now deals 6 to 8 Physical Damage at gem level 1, up to 114 to 174 Physical Damage at gem level 20. Now has an added damage effectiveness of 25% (from 40%). Now gains additional radius as the gem levels.
3.3.0	Now deals 31-47 lightning damage at gem level 1 (up from 9-13), up to 183-275 lightning damage at gem level 20 (up from 50-76). Now deals 65% more area damage (down from 250% more), triggered when channelling ceases. Now has an added damage effectiveness of 40% (up from 10%). Area of effect increased by 10%.
3.1.0	Now correctly modified by factors based on the state of the projectile (such as Powerful Precision`s "Projectiles have 100% increase Critical Strike Chance against Targets they Pierce").
3.0.0	Storm Burst has been added to the game.