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Combustion Support

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Combustion SupportFire, Support
Icon: i
Mana Multiplier: 120%
Requires Level 8Supports any skill that hits enemies.Per 1% Quality:
Supported Skills deal 0.5% increased Fire Damage
Supported Skills have (30-49)% chance to Ignite
Supported Skills deal (10-29)% more Fire Damage
Enemies Ignited by Supported Skills have -(10-19)% 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.png
Acquisition
Level: 8
Purchase Costs
Normal1x Orb of Transmutation
Sell Price
1x Scroll Fragment
Miscellaneous
Item class: Support Skill Gems
Metadata ID: Metadata/Items/Gems/SupportGemChanceToIgnite

Combustion is a support gem that grants supported skills that deal fire damage a chance to ignite the enemy.

Skill functions and interactions

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:


 \pagecolor[RGB]{15,15,15} \color[RGB]{163,141,109} \text{ChanceToIgnite} = 1-(1 - \text{SkillCritChance}) * (1 - \text{SkillIgniteChance})


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 instance an explosion from Molten ShellMolten ShellSpell, AoE, Duration, Fire
Radius: 15
Mana Cost: (12-28)
Can Store 1 Use(s)
Cooldown Time: 1.00 sec
Critical Strike Chance: 5.00%
Damage Effectiveness: 200%
Requires Level 4Summons fiery elemental shields providing additional armour for a short duration. If cumulative physical damage prevented by your blocking or armour reaches a threshold, the shields explode outwards, dealing fire damage to surrounding enemies.Per 1% Quality:
1% chance to Ignite enemies
Deals (14-1962) to (20-2943) Fire Damage
Shields break after (26-1508) total Damage is prevented
(17-943) additional Armour
Base duration is 10 seconds
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Molten Shell skill icon.png
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 Blaze notable passive skill, or the quality bonus on FireballFireballProjectile, Spell, AoE, Fire
Radius: 9
Mana Cost: (6-26)
Cast Time: 0.75 sec
Critical Strike Chance: 6.00%
Damage Effectiveness: 160%
Projectile Speed: 1040
Unleashes a ball of fire towards a target which explodes, damaging nearby foes.Per 1% Quality:
0.5% chance to Ignite enemies
Deals (7-890) to (10-1335) Fire Damage
(20-39)% chance to Ignite enemies
(50-88)% more Damage with Ignite
+(0-4) to radius
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Fireball skill icon.png
.

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 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
or HrimburnHrimburn
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.
, or via lightning damage using StormfireStormfire
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.
.

Gem level progression

LevelLvl.intelligenceIgnite
Chance
more Fire
Damage
resistance
reduction
Exp.Total Exp.
181830%10%-10%00
2102131%11%-10%3,2313,231
3132532%12%-11%9,56912,800
4173133%13%-11%28,18940,989
5213734%14%-12%59,146100,135
6254335%15%-12%111,192211,327
7294936%16%-13%193,800405,127
8335537%17%-13%320,280725,407
9376138%18%-14%507,8391,233,246
10406639%19%-14%554,3791,787,625
11437040%20%-15%755,0492,542,674
12467541%21%-15%1,016,5333,559,207
13497942%22%-16%1,898,6025,457,809
14528443%23%-16%1,964,0197,421,828
15558844%24%-17%2,573,7319,995,559
16589345%25%-17%7,610,83917,606,398
17619746%26%-18%13,436,88431,043,282
186410247%27%-18%25,050,61156,093,893
196710648%28%-19%43,867,38899,961,281
207011149%29%-19%242,078,618342,039,899
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.png

Upgrade paths

This item can be acquired through the following upgrade paths or vendor recipes:
AmountIngredientIngredient
Notes
7Dialla's SubjugationDialla'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
random corrupted 23% Support gem
6The 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
3Gemcutter'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 20% gem

Usage in upgrade paths

This item is used by upgrade paths or vendor recipes to create the following items:
OutcomeAmountIngredientIngredient
Notes
The Goddess ScornedThe Goddess Scorned
Elegant Sword
One Handed Sword
Quality: +20%
Physical Damage: (74-84)(122.1-138.6)
Critical Strike Chance: (9.50%-10.50%)
Attacks per Second: 1.50
Weapon Range: 9
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
Ignited Enemies Burn 50% faster
You can only deal Damage with this Weapon and 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!"
1The Goddess BoundThe Goddess Bound
Whalebone Rapier
One Handed Sword
Quality: +20%
Physical Damage: (14.8-16.8)(66.6-75.6)
Elemental Damage: 3–7
Critical Strike Chance: 5.50%
Attacks per Second: 1.86
Weapon Range: 12
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?"
With 20% quality.
1Elegant SwordElegant SwordOne Handed Sword
Physical Damage: 2033
Critical Strike Chance: 5.00%
Attacks per Second: 1.50
Weapon Range: 9
Requires Level 28, 46 Str, 55 Dex+190 to Accuracy Rating
Base type, with 20% quality and which has sockets that exactly match those on the Goddess Bound, number, color and links included.
1Combustion SupportCombustion SupportFire, Support
Icon: i
Mana Multiplier: 120%
Requires Level 8Supports any skill that hits enemies.Per 1% Quality:
Supported Skills deal 0.5% increased Fire Damage
Supported Skills have (30-49)% chance to Ignite
Supported Skills deal (10-29)% more Fire Damage
Enemies Ignited by Supported Skills have -(10-19)% 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.
With at least 1% quality.
1Orb 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.
N/A

Quest reward

This item is given as 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
3.3.0
  • 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.