Firestorm

FirestormSpell, AoE, Duration, Fire
Radius: 25 / 10
Mana Cost: (9-25)
Cast Time: 0.75 sec
Critical Strike Chance: 6.00%
Damage Effectiveness: 30%Requires Level 12Flaming bolts rain down over the targeted area. They explode when landing, dealing damage to nearby enemies.Per 1% Quality:
1% increased DamageDeals (4-200) to (11-300) Fire Damage
Base duration is 2 seconds
One impact every 0.1 secondsPlace 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/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. This is why, contrary to popular belief, increasing the AoE of Firestorm decreases the average number of hits to 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 30% 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	12	33	9	4 to 11	0	0
2	15	39	10	9 to 14	15,249	15,249
3	19	48	11	12 to 19	41,517	56,766
4	23	56	12	16 to 24	81,983	138,749
5	27	64	13	21 to 31	147,968	286,717
6	31	73	14	26 to 40	250,557	537,274
7	35	81	15	33 to 50	405,086	942,360
8	38	88	16	40 to 59	447,718	1,390,078
9	41	94	17	47 to 70	615,318	2,005,396
10	44	100	18	55 to 82	834,639	2,840,035
11	47	106	18	64 to 96	1,570,760	4,410,795
12	50	113	19	75 to 112	1,633,987	6,044,782
13	53	119	20	87 to 131	2,151,030	8,195,812
14	56	125	21	101 to 152	2,812,189	11,008,001
15	59	132	22	118 to 177	5,099,360	16,107,361
16	62	138	22	136 to 204	9,400,731	25,508,092
17	64	142	23	150 to 225	15,273,366	40,781,458
18	66	146	24	165 to 248	26,286,582	67,068,040
19	68	151	24	182 to 273	62,890,590	129,958,630
20	70	155	25	200 to 300	212,046,017	342,004,647
21	72	159	25	219 to 329	N/A	N/A
22	74	N/A	26	241 to 361	N/A	N/A
23	76	N/A	26	264 to 397	N/A	N/A
24	78	N/A	27	290 to 435	N/A	N/A
25	80	N/A	27	318 to 477	N/A	N/A
26	82	N/A	28	348 to 522	N/A	N/A
27	84	N/A	28	381 to 572	N/A	N/A
28	86	N/A	29	417 to 626	N/A	N/A
29	88	N/A	30	456 to 685	N/A	N/A
30	90	N/A	30	499 to 749	N/A	N/A
31	91	N/A	30	522 to 783	N/A	N/A
32	92	N/A	31	546 to 818	N/A	N/A
33	93	N/A	31	570 to 855	N/A	N/A
34	94	N/A	31	596 to 894	N/A	N/A
35	95	N/A	31	623 to 935	N/A	N/A
36	96	N/A	32	651 to 977	N/A	N/A
37	97	N/A	32	680 to 1021	N/A	N/A
38	98	N/A	32	711 to 1067	N/A	N/A
39	99	N/A	33	743 to 1114	N/A	N/A
40	100	N/A	33	776 to 1164	N/A	N/A

Item acquisition

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 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	8% increased Firestorm explosion Area of Effect	helmet 100 default 0
Enchantment Firestorm Explosion Area Of Effect 2	75	12% increased Firestorm explosion Area of Effect	helmet 100 default 0

Microtransactions

The list below shows microtransactions for Firestorm.

Item	Effect(s)
Siege Firestorm EffectSiege Firestorm EffectFirestorm Skin Stack Size: 20Your Firestorm becomes a flaming siege assault	Your Firestorm becomes a flaming siege assault

Version history

Version	Changes
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.