Firestorm

FirestormSpell, AoE, Duration, Fire
Radius: 25 / 10
Mana Cost: (13-25)
Soul Gain Prevention: 0.001 sec
Cast Time: 0.75 sec
Critical Strike Chance: 6.00%
Effectiveness of Added Damage: 50%Requires Level 28Flaming bolts rain down over the targeted area. They explode when landing, dealing damage to nearby enemies.Per 1% Quality:1Superior2Anomalous3Divergent1% increased DamageFirst Impact deals 3% more damage
Base duration is -0.003 seconds1% reduced Enemy Stun ThresholdBase duration is 1.4 seconds
Deals (22-207) to (33-311) Fire Damage
One impact every 0.2 seconds
First Impact deals 250% more damage
First Impact has 100% more area of effect
Maximum 3 Firestorms at a timePlace into an item socket of the right colour to gain this skill. Right click to remove from a socket.Acquisition
Level: 28Purchase Costs

Normal

1x Orb of Chance

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

Firestorm is a spell that rains numerous fiery bolts in an area, each bolt dealing area of effect fire damage.

Skill functions and interactions

Area of Effect: Increased AoE will increase both the area in which the fireballs randomly fall and also the radius of the individual fireball damage. Full spell damage is done at any point within the AoE of a fireball, however due to the fact that enemies take up an area and not simply a point, less spell damage is dealt to any given enemy as area increases. For this reason increasing the AoE of Firestorm paradoxically decreases the average damage dealt to a single target.

Duration: Increasing duration with either supports or passives will increase the total number of fireballs that fall before the spell ends.

Damage Effectiveness: Damage from secondary sources like 'added damage' supports or heralds applies at only 50% of their listed value.

Damage per Second: Due to the complexity of estimating actual DPS of the skill including all possible factors, ingame tooltip shows only average damage per hit of one fireball, with actual DPS of the skill being considerably higher. The closest currently available estimate can be obtained by using the damage calculator.

Gem level progression

Level			Mana Cost	Fire Damage	Exp.	Total Exp.
1	28	67	13	22 to 33	0	0
2	31	73	14	26 to 39	199,345	199,345
3	34	79	15	31 to 47	285,815	485,160
4	37	85	16	37 to 56	401,344	886,504
5	40	92	16	44 to 66	554,379	1,440,883
6	42	96	17	49 to 74	477,437	1,918,320
7	44	100	18	55 to 83	583,786	2,502,106
8	46	104	18	61 to 92	710,359	3,212,465
9	48	109	19	68 to 102	1,355,511	4,567,976
10	50	113	19	76 to 114	1,138,877	5,706,853
11	52	117	20	84 to 126	1,368,233	7,075,086
12	54	121	20	93 to 140	1,638,338	8,713,424
13	56	125	21	104 to 155	1,956,648	10,670,072
14	58	130	21	115 to 172	3,655,184	14,325,256
15	60	134	22	127 to 190	3,017,327	17,342,583
16	62	138	22	140 to 210	7,759,995	25,102,578
17	64	142	23	155 to 232	15,138,193	40,240,771
18	66	146	24	171 to 256	26,083,825	66,324,596
19	68	151	24	188 to 282	62,620,247	128,944,843
20	70	155	25	207 to 311	211,708,088	340,652,931
21	72	159	25	228 to 343	N/A	N/A
22	74	N/A	26	251 to 377	N/A	N/A
23	76	N/A	26	276 to 415	N/A	N/A
24	78	N/A	27	304 to 456	N/A	N/A
25	80	N/A	27	334 to 501	N/A	N/A
26	82	N/A	28	367 to 550	N/A	N/A
27	84	N/A	28	403 to 604	N/A	N/A
28	86	N/A	29	442 to 663	N/A	N/A
29	88	N/A	30	485 to 727	N/A	N/A
30	90	N/A	30	531 to 797	N/A	N/A
31	91	N/A	30	556 to 834	N/A	N/A
32	92	N/A	31	582 to 873	N/A	N/A
33	93	N/A	31	609 to 914	N/A	N/A
34	94	N/A	31	638 to 956	N/A	N/A
35	95	N/A	31	667 to 1001	N/A	N/A
36	96	N/A	32	698 to 1047	N/A	N/A
37	97	N/A	32	731 to 1096	N/A	N/A
38	98	N/A	32	764 to 1147	N/A	N/A
39	99	N/A	33	800 to 1199	N/A	N/A
40	100	N/A	33	836 to 1255	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 a 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 Firestorm.

Name		Stats	Spawn Weighting
Enchantment Firestorm Damage 1	66	25% increased Firestorm Damage	helmet 100 default 0
Enchantment Firestorm Damage 2	75	40% increased Firestorm Damage	helmet 100 default 0
Enchantment Firestorm Duration 1	66	20% increased Firestorm Duration	helmet 100 default 0
Enchantment Firestorm Duration 2	75	30% increased Firestorm Duration	helmet 100 default 0
Enchantment Firestorm Explosion Area Of Effect 1	66	16% increased Firestorm explosion Area of Effect	helmet 100 default 0
Enchantment Firestorm Explosion Area Of Effect 2	75	24% increased Firestorm explosion Area of Effect	helmet 100 default 0

Alternate skill effects

Firestorm has the following alternate skill effects:

Item	Effect(s)
Siege Firestorm EffectSiege Firestorm EffectSkill Gem EffectYour Firestorm becomes a flaming siege assault	Your Firestorm becomes a flaming siege assault
Stygian Firestorm EffectStygian Firestorm EffectSkill Gem EffectYour Firestorm becomes a Stygian Firestorm	Your Firestorm becomes a Stygian Firestorm

Version history

Version	Changes
3.13.0	Firestorm has a new skillbar icon. Now grants more damage with hits and ailments on the first impact (previously it granted more area damage, which does not apply to ailments). The first impact now deals 250% more damage (from 150%) with hits and ailments.
3.12.0	Firestorm now calls down a large meteor that impacts the targeted location, followed by a series of smaller impacts at set intervals over the storm's duration. The base power of the spell has been significantly raised, so you are now limited to three Firestorms at any given time (any new storms created will replace the oldest). Now requires level 28 at gem level 1 (from 12). Please be aware that existing low level characters with Firestorm socketed may have that gear slot disabled until the Firestorm gem is removed. Now has a mana cost of 13 at gem level 1, up to 25 at gem level 20. Now has an added damage effectiveness of 50%. Now deals 22 to 33 fire damage at gem level 1, up to 207 to 311 fire damage at gem level 20. Now has a base duration of 1.4 seconds with one impact every 0.2 seconds. The first impact now has 100% more area of effect and deals 150% more damage. Now has alternative quality: Anomalous: First Impact deals 3% more damage and Base duration is -0.003 seconds (per 1% quality) Divergent 1% reduced Enemy Stun Threshold (per 1% quality)
3.11.0	The visual effects have been improved. Now deals 7 to 11 Fire Damage at gem level 1 (from 4 to 11). Now has an added Damage effectiveness of 45% (from 30%).
3.6.0	Mana Cost at gem level 20 is now 25 (was 26). Now deals 4 to 11 Fire damage at gem level 1 (unchanged) and 200 to 300 Fire damage at gem level 20 (from 202 to 302). Now has a cast time of 0.75 seconds (from 0.9).
3.3.0	Now deals 4-11 fire damage at gem level 1 (up from 4-10), up to 202-302 fire damage at gem level 20 (up from 162-243).
2.1.0	Damage increased by around 20% higher at level 20.
2.0.0	Firestorm: Had a very slight damage buff. Area of effect of explosions increased by 11% (9 to 10). It now grants 1% area damage per 1% quality instead of reduced delay between fireballs. The Duration of Firestorm has been increased from 1.3 seconds to 2 seconds at all levels. Base Cast Speed has been increased from a cast time of 1 second to 900ms. Critical Strike Chance has been increased from 5% to 6%.
1.0.4	Firestorm: The radius of the area that fireballs land in has been increased by 39%. The delay between strikes has been reduced from 0.15 seconds to 0.10 seconds. Damage has been increased by 35%. The quality bonus has been reduced by 33.33% to match the reduced projectile delay.
1.0.0	Reduced mana cost.
0.11.2	The damage done by the Firestorm spell when used by all versions of Ambrosia and Merciless Fire Fury has been increased. Merciless Gravicius's Firestorm has been very slightly increased in damage.
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.
0.9.12qq	Fixed a bug where monsters in high level areas would not do the correct Firestorm damage.
0.9.11i	Fixed the randomness when it was used with Traps.
0.9.11f	Increased the damage and made its cluster tighter.
0.9.9	Fixed a bug where the damage from Firestorm would not display on the client at the right time.
0.9.6	Changed Firestorm to be affected less by additional damage from support gems. Fixed a bug where Firestorm could hit monsters through walls.
0.9.5	Modified Firestorm's behaviour so that the explosions have a larger radius and are more likely to fall near the centre of the affected area. Doubled the number of fireballs that fall and rebalanced damage around these changes.
0.9.3c	Raised the overall damage and its high level damage scaling.
0.9.3	Firestorm has been added to the game.