Firestorm

FirestormBarrageable, Spell, AoE, Sustained, Fire, Duration, Payoff
Tier: 11
Level: (1-20)
Cost: (16-168) Mana
Cast Time: 1.40 sec
Critical Strike Chance: 7.00%Rain flaming bolts over the targeted area. Ignites on enemies and Corpses in front of you are Consumed to fuel the Firestorm by creating improved bolts.Deals (3-96) to (5-144) Fire Damage
Impact radius is 1 metre
Storm radius is 5.6 metres
Storm duration is 6 seconds
One impact every 0.10 seconds
Improves 5 Bolts per Ignite Consumed
Limit 1 Firestorm

Additional Effects From 1-20% Quality:
+(0.01-0.2) metres to impact radiusSkills can be managed in the Skills Panel.

Acquisition
Drop restricted
It can be obtained by engraving an Uncut Skill Gem.Metadata
Item class: Skill Gem
Metadata ID: Metadata/Items/Gems/SkillGemFirestorm

Firestorm is an AoE fire spell skill that calls a storm, raining down flaming bolts that deal damage in a area. The skill will consume Elemental Infusions on you to create additional bolts of that element.

Gem level progression

Level		Mana Cost	Fire Damage
1	0	16	3 to 5
2	3	18	5 to 7
3	6	20	6 to 10
4	10	23	8 to 13
5	14	26	11 to 16
6	18	29	13 to 20
7	22	33	16 to 24
8	26	38	19 to 28
9	31	43	22 to 33
10	36	48	26 to 39
11	41	55	30 to 45
12	46	62	35 to 52
13	52	70	40 to 59
14	58	80	45 to 68
15	64	90	52 to 77
16	66	102	59 to 88
17	72	116	66 to 100
18	78	131	75 to 113
19	84	148	85 to 127
20	90	168	96 to 144

Recommended support gems

The following support gems are recommendations by GGG as listed in-game, and do not necessarily reflect optimal combinations or the views of the wiki.

Gem tier	Support gems
I	HourglassHourglassSupport Category: Grants Cooldown Tier: 1 Cooldown Time: 10.00 sec Can Store 1 Use(s)Support Requirements: +5 IntSupports any damaging skill that you use yourself, causing it to deal significantly more damage but gain a long cooldown. Cannot support Skills which already have a cooldown.Supported Skills deal 30% more Damage Supported Skills have a Cooldown of 10 secondsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Overabundance IOverabundance ISupport Category: Overabundance Tier: 1Support Requirements: +5 DexSupports skills which can have a Limited number of effects active at once, increasing that Limit at the cost of their duration. Only applies to restrictions that use the word "Limit".Supported Skills have +1 to Limit Supported Skills have 50% less Skill Effect DurationPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Prolonged Duration IProlonged Duration ISupport, Duration Category: Prolonged Duration Tier: 1 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports any skill that has a duration, making that duration longer.Supported Skills have 30% more Skill Effect DurationPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
II	Considered CastingConsidered CastingSupport, Spell Category: Considered Casting Tier: 2 Cost & Reservation Multiplier: 115%Support Requirements: +5 IntSupports Spell Skills that Hit Enemies and you cast yourself, boosting Damage at the cost of Cast Speed.Supported Spell Skills have 15% less Cast Speed Supported Spells deal 35% more DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Rising TempestRising TempestSupport Category: Rising Tempest Tier: 2 Cost & Reservation Multiplier: 120%Support Requirements: +5 IntSupports Skills which deal Damage, raising Elemental Damage dealt for each Skill used Recently of a different Elemental type. Cannot support Minion Skills.Supported Skills deal 12% more Elemental Damage for each Skill used Recently of a different Elemental typePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
III	DeliberationDeliberationSupport Category: Deliberation Tier: 3Support Requirements: +5 DexSupports skills that can be used while moving, causing you to move slower while using them, but granting more damage in exchange.Supported Skills deal 20% more Damage 30% more Movement Speed penalty while using Supported SkillsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Elemental FocusElemental FocusSupport Category: Elemental Focus Tier: 3Support Requirements: +5 IntSupports any skill that Hits enemies, causing it to deal more Elemental Damage but be unable to inflict Elemental Ailments.Supported Skills deal 25% more Elemental Damage Supported Skills cannot inflict Elemental AilmentsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Prolonged Duration IIProlonged Duration IISupport, Duration Category: Prolonged Duration Tier: 3 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports any skill that has a duration, making that duration longer.Supported Skills have 35% more Skill Effect DurationPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
IV	Execute IIExecute IISupport Category: Execute Tier: 4 Cost & Reservation Multiplier: 110%Support Requirements: +5 StrSupports any skill that Hits enemies, causing it to deal more damage against enemies on Low Life.Supported Skills deal 50% more Damage with Hits against Enemies that are on Low LifePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Fire ExposureFire ExposureSupport, Fire, Duration Category: Fire Exposure Tier: 4 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports any skill that Hits enemies, causing it to inflict Exposure when Igniting.Supported Skills inflict Exposure for 8 seconds on Igniting a targetPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Overabundance IIOverabundance IISupport Category: Overabundance Tier: 4Support Requirements: +5 DexSupports skills which can have a Limited number of effects active at once, increasing that Limit at the cost of their duration. Only applies to restrictions that use the word "Limit".Supported Skills have +1 to Limit Supported Skills have 40% less Skill Effect DurationPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
V	Fire MasteryFire MasterySupport, Fire Category: Mastery Tier: 5Support Requirements: +5 IntSupports Fire skills, granting them an additional level. Does not support skills which do not have levels.+1 to Level of Supported Fire SkillsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.	Fire Penetration IIFire Penetration IISupport, Fire Category: Fire Penetration Tier: 5 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports any skill that Hits enemies, making those Hits ignore enemy Fire resistance.Hits from Supported Skills ignore enemy Fire ResistancePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.

Item acquisition

Firestorm has restrictions on where or how it can drop.

It can be obtained by engraving an Uncut Skill Gem.

Alternate skill effects

Firestorm has the following alternate skill effects:

Item	Description

Version history

Version	Changes
0.3.0	The base damage scaling of all player spell and secondary damage skills has been tweaked to scale better in the late game. Firestorm: Now has a base Radius of 2.8 metres (previously 5.6), and creates one bolt every 0.2 seconds (previously every 0.1 seconds). No longer consumes Ignite to create improved bolts, instead, it can now consume every type of Elemental Infusion. Fire Infusion causes the storm to double in size and create three times as many bolts. Cold and Lightning Infusions cause the storm to create additional cold and lightning bolts respectively. One of each Infusion can be consumed by a single use of the Skill. Fire Bolt damage is now 16-56 to 23-83 at Gem levels 11-20 (previously 26-96 to 39-144).
0.2.1	Firestorm can now consume Ignites from corpses in front of you in addition to living enemies. Added "Barrageable" gem tag.[Undocumented]
0.2.0	Many Skills have had their base damage and/or damage growth per level rebalanced. Most of these changes are not specifically mentioned below as the changes are too widespread. Firestorm's Improved Bolts now have a Critical Hit Chance of 7% (previously 14%).
0.1.0d	Rain of Arrows and Firestorm now have a hit-rate limit to prevent cases of them absolutely obliterating very large bosses. This will have little to no impact outside of boss fights with very large hitboxes.
0.1.0	Introduced to the game.