Combustion Support
Icon: i
Mana Multiplier: 120%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 DamageSupported 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 ResistanceThis 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.

Level: 8Purchase Costs
Normal | 1x Orb of Transmutation |
1x Scroll FragmentMiscellaneous
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.
Contents
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:
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 PathConsecrated PathFire, Attack, AoE, Movement, Duration, Slam, Melee
Mana Cost: 8
Cast Time: 1.00 sec
Attack Speed: 80% 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:12340.5% 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 targetsPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. 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: (6-25)
Cast Time: 0.75 sec
Critical Strike Chance: 6.00%
Effectiveness of Added Damage: 240%
Projectile Speed: 1040Unleashes a ball of fire towards a target which explodes, damaging nearby foes.Per 1% Quality:12341% increased Projectile Speed2% reduced Projectile Speed
3% increased Area of Effect3% increased Effect of non-Damaging Ailments on Enemies
-2% more Damage with Ignite0.25% chance to Debilitate Enemies for 1 second on HitDeals (9-1095) to (14-1643) Fire Damage
(20-39)% chance to Ignite enemies
(50-88)% more Damage with Ignite
Projectiles gain Radius as they travel farther, up to +(0-9) RadiusPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket..
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 MaskQuality: +20%
Evasion: 115
Energy Shield: 22Requires 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 GlovesQuality: +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 IgniteGiant's blood you cannot tame,
as wild as an unwatched flame., or via lightning damage using
StormfireStormfire
Opal RingRequires 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 IgniteWhen your skin sloughs, and your blood cooks,
you'll wish the lightning strike had killed you..
Gem level progression
Level | ![]() | ![]() | Ignite Chance | more Fire Damage | resistance reduction | Exp. | Total Exp. |
---|---|---|---|---|---|---|---|
1 | 8 | 18 | 30% | 10% | -10% | 0 | 0 |
2 | 10 | 21 | 31% | 11% | -10% | 3,231 | 3,231 |
3 | 13 | 25 | 32% | 12% | -11% | 9,569 | 12,800 |
4 | 17 | 31 | 33% | 13% | -11% | 28,189 | 40,989 |
5 | 21 | 37 | 34% | 14% | -12% | 59,146 | 100,135 |
6 | 25 | 43 | 35% | 15% | -12% | 111,192 | 211,327 |
7 | 29 | 49 | 36% | 16% | -13% | 193,800 | 405,127 |
8 | 33 | 55 | 37% | 17% | -13% | 320,280 | 725,407 |
9 | 37 | 61 | 38% | 18% | -14% | 507,839 | 1,233,246 |
10 | 40 | 66 | 39% | 19% | -14% | 554,379 | 1,787,625 |
11 | 43 | 70 | 40% | 20% | -15% | 755,049 | 2,542,674 |
12 | 46 | 75 | 41% | 21% | -15% | 1,016,533 | 3,559,207 |
13 | 49 | 79 | 42% | 22% | -16% | 1,898,602 | 5,457,809 |
14 | 52 | 84 | 43% | 23% | -16% | 1,964,019 | 7,421,828 |
15 | 55 | 88 | 44% | 24% | -17% | 2,573,731 | 9,995,559 |
16 | 58 | 93 | 45% | 25% | -17% | 7,610,839 | 17,606,398 |
17 | 61 | 97 | 46% | 26% | -18% | 13,436,884 | 31,043,282 |
18 | 64 | 102 | 47% | 27% | -18% | 25,050,611 | 56,093,893 |
19 | 67 | 106 | 48% | 28% | -19% | 43,867,388 | 99,961,281 |
20 | 70 | 111 | 49% | 29% | -19% | 242,078,618 | 342,039,899 |
21 | 72 | 114 | 50% | 30% | -20% | N/A | N/A |
22 | 74 | N/A | 51% | 31% | -20% | N/A | N/A |
23 | 76 | N/A | 52% | 32% | -21% | N/A | N/A |
24 | 78 | N/A | 53% | 33% | -21% | N/A | N/A |
25 | 80 | N/A | 54% | 34% | -22% | N/A | N/A |
26 | 82 | N/A | 55% | 35% | -22% | N/A | N/A |
27 | 84 | N/A | 56% | 36% | -23% | N/A | N/A |
28 | 86 | N/A | 57% | 37% | -23% | N/A | N/A |
29 | 88 | N/A | 58% | 38% | -24% | N/A | N/A |
30 | 90 | N/A | 59% | 39% | -24% | N/A | N/A |
31 | 91 | N/A | 59% | 39% | -24% | N/A | N/A |
32 | 92 | N/A | 60% | 40% | -25% | N/A | N/A |
33 | 93 | N/A | 60% | 40% | -25% | N/A | N/A |
34 | 94 | N/A | 61% | 41% | -25% | N/A | N/A |
35 | 95 | N/A | 61% | 41% | -25% | N/A | N/A |
36 | 96 | N/A | 62% | 42% | -26% | N/A | N/A |
37 | 97 | N/A | 62% | 42% | -26% | N/A | N/A |
38 | 98 | N/A | 63% | 43% | -26% | N/A | N/A |
39 | 99 | N/A | 63% | 43% | -26% | N/A | N/A |
40 | 100 | N/A | 64% | 44% | -27% | 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 |
---|---|---|---|
9 | ![]() ![]() ![]() as a symbol of our progress, shines greater than all the gems. ![]() | random level 20 Support gem | Automatic |
7 | ![]() ![]() ![]() Quality: +23% CorruptedA 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 superior Support gem (Q23) | Automatic |
6 | ![]() ![]() ![]() - Ezomyte Proverb ![]() | random level 20 gem | Automatic |
3 | ![]() ![]() ![]() 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 |
Usage in upgrade paths
This item is used by upgrade paths or vendor recipes to create the following items:
Outcome | Amount | Ingredient | Ingredient Notes | Type |
---|---|---|---|---|
![]() Elegant SwordOne 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: 11Requires 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 IgniteHer 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!" ![]() | 1 | ![]() Whalebone RapierOne Handed Sword Quality: +20% Physical Damage: (14.8-16.8)–(62.9-71.4) Elemental Damage: 3–7 Critical Strike Chance: 5.50% Attacks per Second: 1.92 Weapon Range: 14Requires 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 LifeShe 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. | Manual |
1 | ![]() Physical Damage: 20–33 Critical Strike Chance: 5.00% Attacks per Second: 1.50 Weapon Range: 11Requires 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. | ||
1 | ![]() Icon: i Mana Multiplier: 120%Requires Level 8Supports any skill that hits enemies.Per 1% Quality:123Supported 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 DamageSupported 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 ResistanceThis 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. | ||
1 | ![]() Shift click to unstack. ![]() | N/A |
Quest reward
This item is given as a quest reward for the following quests:
Class → | Witch | Shadow | Ranger | Duelist | Marauder | Templar | Scion |
---|---|---|---|---|---|---|---|
Quest ↓ | |||||||
The Caged Brute 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 Caged Brute Act 1 Nessa | ✓ | ✓ | ✗ | ✗ | ✓ | ✓ | ✗ |
A Fixture of Fate Act 3 Siosa | ✓ | ||||||
Fallen from Grace Act 6 Lilly Roth | ✓ |
Version history
Version | Changes |
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3.3.0 |
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3.0.0 |
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0.9.9 |
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0.9.4e |
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0.9.3 |
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