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Combustion SupportFire, Support
Icon: i
Level: (1-20)
Cost & Reservation Multiplier: 130%
Requires Level 8Supports any skill that hits enemies.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills deal 0.5% increased Fire DamageIgnites from Supported Skills deal Damage 0.25% fasterIgnites from Supported Skills deal Damage 0.5% slower
Supported Skills deal 1% increased Fire Damage
Supported Skills have 25% chance to Ignite
Supported Skills deal (10-19)% more Fire Damage
Enemies Ignited by Supported Skills have -10% to Fire Resistance
This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
Combustion Support inventory icon
Acquisition
Area level: 8
Vendor Prices
Normal1x Orb of Transmutation
Vendor Offer
1x Scroll Fragment
Metadata
Item class: Support Skill Gems
Metadata ID: Metadata/Items/Gems/SupportGemChanceToIgnite


Combustion is a support gem that grants supported skills that grants more fire damage and chance to ignite the enemy. Enemies ignited by the supported skill have reduced fire resistance. Note

Skill functions and interactions[]

Note that even though this skill 'Supports any skill that hits enemies', by default only fire damage can ignite. Therefore it by default only helps skills dealing fire damage, see more on ignite, including uniques that enable other elements to ignite. The fire damage could be supplied by gear or for minions for instance a jewel with 'Minions deal additional Fire Damage'.

The Chance to Ignite an enemy given by this gem is independent of the chance to ignite an enemy as a result of a critical strike. The overall probability that an enemy will be ignited is:


It is worth noting that as opposed to chance to critical strike, which is checked once for each cast of the skill, the chance to ignite is checked separately for each individual hit. For example, a hit from Consecrated Path inventory iconConsecrated PathConsecrated PathFire, Attack, AoE, Movement, Duration, Slam, Melee
Level: (1-20)
Cost: 8 Mana
Attack Speed: 80% of base
Attack Damage: (150-184)% of base
Effectiveness of Added Damage: (150-184)%
Requires Level 28Slams the ground at a targeted location. If an enemy is near where you target, you'll teleport to it from a short distance away, slam, and create an area of consecrated ground. Can't be supported by Multistrike, and requires a Sword, Axe, Mace, Sceptre, Staff or Unarmed.Per 1% Quality:1Superior2Anomalous3Divergent4Phantasmal0.5% increased Area of Effect0.5% increased Attack Speed0.5% increased teleport range2% increased Consecrated Ground AreaDeals (150-184.25)% of Base Attack Damage
50% of Physical Damage Converted to Fire Damage
Base duration is 4 seconds
Deals up to 20% more Damage to closer targets
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Consecrated Path skill icon
Consecrated Path inventory icon
linked with Combustion that hits two enemies at once could potentially ignite one enemy, but not the other.

The chance to Ignite from this gem will stack additively with chance to Ignite modifiers from other sources, such as from the Ash, Frost and Storm notable passive skill, or the stat of Firestorm inventory iconFirestormFirestormSpell, AoE, Duration, Fire
Level: (1-20)
Cost: (13-25) Mana
Soul Gain Prevention: 0 sec
Cast Time: 0.75 sec
Critical Strike Chance: 6.00%
Effectiveness of Added Damage: 55%
Requires Level 28Flaming bolts rain down over the targeted area. They explode when landing, dealing damage to nearby enemies.Per 1% Quality:1Superior2Anomalous3Divergent1% increased Damage0.5% chance to Ignite enemies1% 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 325% more Damage with Hits and Ailments
First Impact has 100% more Area of Effect
Maximum 3 Firestorms at a time
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Firestorm skill icon
Firestorm inventory icon
.

The normal rules for burning apply, linking this gem to a skill that deals no fire damage is pointless; unless the user is igniting enemies via cold damage skills with The Three Dragons inventory iconThe Three DragonsThe Three Dragons
Golden Mask
Quality: +20%
Evasion: 115
Energy Shield: 22
Requires Level 35, 40 Dex, 40 Int+(26-30)% to all Elemental Resistances
Your Fire Damage can Shock but not Ignite
Your Cold Damage can Ignite but not Freeze or Chill
Your Lightning Damage can Freeze but not Shock
"The ice seared his naked feet
As the lightning stilled his heart,
But it was the flames upon his lover's face
That roused him to vengeance."
- From 'The Three Dragons' by Victario of Sarn
The Three Dragons inventory icon
or Hrimsorrow inventory iconHrimburnHrimburn
Goathide Gloves
Quality: +20%
Evasion: (86-98)
Requires Level 24, 17 Dex+(20-30) to Strength
Adds (5-7) to (13-15) Cold Damage to Spells and Attacks
+(40-50) to Evasion Rating
+(20-30)% to Cold Resistance
50% of Physical Damage Converted to Cold Damage
Reflects 10 Cold Damage to Melee Attackers
Your Cold Damage can Ignite
Giant's blood you cannot tame,
as wild as an unwatched flame.
Hrimsorrow inventory icon
, or via lightning damage using Stormfire inventory iconStormfireStormfire
Opal Ring
Requires Level 80(15-25)% increased Elemental Damage(40-45)% increased Mana Regeneration Rate
+(20-30)% to Fire and Lightning Resistances
(4-6)% increased Burning Damage for each time you have Shocked a Non-Shocked Enemy Recently
Adds (1-3) to (62-70) Lightning Damage to Hits against Ignited Enemies
Your Lightning Damage can Ignite
When your skin sloughs, and your blood cooks,
you'll wish the lightning strike had killed you.
Stormfire inventory icon
.

Gem level progression[]

LevelRequired LevelRequired IntelligenceIgnite
Chance
more Fire
Damage
resistance
reduction
Exp.Total Exp.
181830%10%-10%00
2102131%11%-10%32313231
3132532%12%-11%956912800
4173133%13%-11%2818940989
5213734%14%-12%59146100135
6254335%15%-12%111192211327
7294936%16%-13%193800405127
8335537%17%-13%320280725407
9376138%18%-14%5078391233246
10406639%19%-14%5543791787625
11437040%20%-15%7550492542674
12467541%21%-15%10165333559207
13497942%22%-16%18986025457809
14528443%23%-16%19640197421828
15558844%24%-17%25737319995559
16589345%25%-17%761083917606398
17619746%26%-18%1343688431043282
186410247%27%-18%2505061156093893
196710648%28%-19%4386738899961281
207011149%29%-19%242078618342039899
217211450%30%-20%N/AN/A
2274N/A51%31%-20%N/AN/A
2376N/A52%32%-21%N/AN/A
2478N/A53%33%-21%N/AN/A
2580N/A54%34%-22%N/AN/A
2682N/A55%35%-22%N/AN/A
2784N/A56%36%-23%N/AN/A
2886N/A57%37%-23%N/AN/A
2988N/A58%38%-24%N/AN/A
3090N/A59%39%-24%N/AN/A
3191N/A59%39%-24%N/AN/A
3292N/A60%40%-25%N/AN/A
3393N/A60%40%-25%N/AN/A
3494N/A61%41%-25%N/AN/A
3595N/A61%41%-25%N/AN/A
3696N/A62%42%-26%N/AN/A
3797N/A62%42%-26%N/AN/A
3898N/A63%43%-26%N/AN/A
3999N/A63%43%-26%N/AN/A
40100N/A64%44%-27%N/AN/A

Item acquisition
Questionmark

Upgrade paths

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

AmountIngredientGeneral
Notes
Type
9Divination card inventory iconGift of the Gemling QueenGift of the Gemling Queen card artDivination card frameGift of the Gemling Queen9Level 20 Support GemOur Lady Dialla,
as a symbol of our progress,
shines greater than all the gems.
Divination card inventory icon
random level 20 Support gemAutomatic
7Divination card inventory iconDialla's SubjugationDialla's Subjugation card artDivination card frameDialla's Subjugation7Superior Support Gem
Quality: +23%
Corrupted
A symbol of beauty and innocence
The gems corrupted her mind
Malachai corrupted her gems
All but a glimmer of
greatness lost in madness
Divination card inventory icon
random corrupted superior Support gem with 23% qualityAutomatic
8Divination card inventory iconDying AnguishDying Anguish card artDivination card frameDying Anguish8Level 19 Gem
Alternative Quality: +19%
Moribund, he gazed upon the journey taken as blood trickled down his chin. His eye closed on the city ahead that he would never call home.
Divination card inventory icon
random level 19 gem with 19% alternative qualityAutomatic
1Gemcutter's Incubator inventory iconGemcutter's IncubatorGemcutter's IncubatorAdds an incubated Quality Gem item to an equippable item
Item drops after killing # monsters
Quality GemRight click this item then left click an item to apply it. The Incubated item drops after killing a specific number of monsters.
Gemcutter's Incubator inventory icon
random superior gemAutomatic
6Divination card inventory iconThe FoxThe Fox card artDivination card frameThe Fox6Level 20 Gem"Masters of wit, strength and cunning. To survive the harsh winters, you must be like the fox."
- Ezomyte Proverb
Divination card inventory icon
random level 20 gemAutomatic
3Divination card inventory iconGemcutter's PromiseGemcutter's Promise card artDivination card frameGemcutter'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
Divination card inventory icon
random superior gem with 20% qualityAutomatic
1Divination card inventory iconThe VoidThe Void card artDivination card frameThe Void1Reach into the Void and claim your prize.Divination card inventory iconrandom divination card set exchangeAutomatic

Usage in upgrade paths

This item is used by upgrade paths or vendor recipes to create the following items:

OutcomeAmountIngredientIngredient
Notes
Type
The Goddess Scorned inventory iconThe Goddess ScornedThe Goddess Scorned
Elegant Sword
One Handed Sword
Quality: +20%
Physical Damage: (74-84) to (122.1-138.6)
Critical Strike Chance: (9.50%-10.50%)
Attacks per Second: 1.50
Weapon Range: 11
Requires Level 28, 46 Str, 55 Dex+190 to Accuracy RatingUses both hand slots
(250-300)% increased Physical Damage
(90-110)% increased Critical Strike Chance
+(20-30)% to Global Critical Strike Multiplier
+(40-50)% to Fire Resistance
Cannot be Ignited
100% of Physical Damage Converted to Fire Damage
Ignites you inflict deal Damage 50% faster
You can only deal Damage with this Weapon or Ignite
Her purpose seems done; the oath is fulfilled.
Rust dulls her smirk with the last demon killed.
The embers grow dim and yet hope burns her lips:
"An old flame renewed can define our eclipse!"
The Goddess Scorned inventory icon
1The Goddess Bound inventory iconThe Goddess BoundThe Goddess Bound
Whalebone Rapier
One Handed Sword
Quality: +20%
Physical Damage: (14.8-16.8) to (62.9-71.4)
Elemental Damage: 3-7
Critical Strike Chance: 5.50%
Attacks per Second: 1.92
Weapon Range: 14
Requires Level 7, 32 Dex+25% to Global Critical Strike Multiplier+1 to Level of Socketed Melee Gems
Uses both hand slots
(250-300)% increased Physical Damage
Adds 3 to 7 Fire Damage
20% increased Attack Speed
30% increased Global Critical Strike Chance
+(20-40) to Evasion Rating
20% reduced Rarity of Items found
30% increased Movement Speed when on Low Life
She paints her offer in wicked hues
An off-white grin, an elegant bruise.
To the nascent scourge she sings the ruse:
"With me in hand, what else need you use?"
The Goddess Bound inventory icon
With 20% quality.Manual
1Elegant Sword inventory iconElegant SwordElegant SwordOne Handed Sword
Physical Damage: 20-33
Critical Strike Chance: 5.00%
Attacks per Second: 1.50
Weapon Range: 11
Requires Level 28, 46 Str, 55 Dex+190 to Accuracy Rating
Elegant Sword inventory icon
Base type, with 20% quality and which has sockets that exactly match those on the Goddess Bound, number, color and links included.
1Combustion Support inventory iconCombustion SupportCombustion SupportFire, Support
Icon: i
Level: (1-20)
Cost & Reservation Multiplier: 130%
Requires Level 8Supports any skill that hits enemies.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills deal 0.5% increased Fire DamageIgnites from Supported Skills deal Damage 0.25% fasterIgnites from Supported Skills deal Damage 0.5% slower
Supported Skills deal 1% increased Fire Damage
Supported Skills have 25% chance to Ignite
Supported Skills deal (10-19)% more Fire Damage
Enemies Ignited by Supported Skills have -10% to Fire Resistance
This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
Combustion Support inventory icon
With at least 1% quality.
1Orb of Fusing inventory iconOrb of FusingOrb of FusingStack Size: 20Reforges the links between sockets on an itemRight click this item then left click a socketed item to apply it. The item's quality increases the chances of obtaining more links.
Shift click to unstack.
Orb of Fusing inventory icon
N/A

Quest reward

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

Class →WitchShadowRangerDuelistMarauderTemplarScion
Quest ↓
The Caged Brute
Act 1

Vendor reward

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

Class →WitchShadowRangerDuelistMarauderTemplarScion
Quest ↓
The Caged Brute
Act 1
Nessa
A Fixture of Fate
Act 3
Siosa
Fallen from Grace
Act 6
Lilly Roth

Version history[]

Version Changes
3.15.0
  • Now has a 140% Cost and Reservation Multiplier (previously 120%).
  • Supported Skills now have 25% chance to Ignite (previously 30-49%).
  • Supported Skills now deal 10-19% more Fire Damage (previously 10-29%).
  • Enemies Ignited by Supported Skills now have -10% to Fire Resistance (previously -10-19%).
3.3.0
  • The Chance to Ignite Support Gem has been renamed to Combustion Support. Enemies ignited by supported skills lose up to 19% fire resistance. At gem level 20, it has 29% more fire damage, 49% chance to ignite, and -19% fire resistance on ignited enemies.
3.0.0
  • Chance to Ignite now grants 10% more Fire Damage at gem level 1, up to 29% more Fire Damage at gem level 20.
0.9.9
  • Increased mana cost multiplier from 100% to 110%.
0.9.4e
  • Fixed a bug where Chance to Ignite did not scale properly under the Elemental Weakness curse.
0.9.3
  • Chance to Ignite has been added to the game.
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