Mechanic

Flammability

Flammability is a stackable Debuff that builds from contributing damage and determines the chance for Hits to Ignite. It is not itself an Ailment, and its magnitude is separate from the magnitude of the resulting Ignite.

0.5.4d

Current data

Catalog version 0.5.4d

No direct 0.5 patch change is linked to this page. The displayed values are current for catalog version 0.5.4d.

What Flammability does

Current rules

Fire damage from Hits normally contributes Flammability based on pre-mitigation damage relative to the target's Ailment Threshold. Add the magnitude of all active Flammability stacks, including the stack from the current Hit, then use that total to determine the Hit's Ignite chance. Each 1% total Flammability gives 1% Ignite chance for every 5% of Ailment Threshold dealt by the Hit, up to the 100% Flammability cap. The Ignite's damage is calculated separately from the damage of the Hit that inflicted it.

Flammability is not Ignite: Flammability determines a Hit's chance to Ignite. Ignite is the separate damaging Ailment that deals Fire damage over time after an Ignite succeeds.
Contributing damage builds magnitude: Fire damage from Hits contributes to Flammability by default. The game compares the contributing pre-mitigation damage with the target's Ailment Threshold to produce that Hit's Flammability magnitude.
Total magnitude sets Ignite chance: Each 1% total Flammability magnitude grants 1% chance to Ignite for every 5% of Ailment Threshold dealt by the Hit. The new Flammability from that Hit is included before its Ignite chance is checked.
Worked chance examples: At 20% total Flammability, a Hit dealing 5% of Ailment Threshold has 20% Ignite chance, a Hit dealing 10% has 40%, and a Hit dealing 25% reaches 100%. Chance is capped at 100%.
Flammability stacks: Unlike ordinary same-type Debuffs, Flammability instances add their magnitudes together. Every stack has its own duration and expires independently.
Duration and magnitude cap: Flammability lasts eight seconds on enemies and four seconds on players by default. Total Flammability magnitude is capped at 100%.
Non-hit Ignites need buildup: Effects that Ignite as though dealing damage can also inflict Flammability, but they cannot Ignite until the target has at least 50% Flammability magnitude.
Chance scaling affects buildup: Although Flammability is not an Ailment, applicable modifiers to Ailment chance affect Flammability magnitude. Effects that remove, consume, or grant immunity to Ignite also affect Flammability.

Flammability scaling and damage-contribution changes

7 cases

Normal Fire Hit

The Hit's Fire damage contributes to Flammability and Ignite magnitude. Critical Hits do not guarantee Ignite, but their higher damage can create more Flammability and therefore more Ignite chance.

Related: Fire, Hit, Critical Hit, Ignite, Magnitude

Periphery

Allows all Elemental damage from Hits to contribute to Flammability and Ignite magnitudes instead of relying only on Fire damage.

Physical Damage41-76Critical Hit Chance5%Attacks per Second(1.35-1.43)Fire Damage(48-59) to (75-97)Cold Damage(35-53) to (65-80)Lightning Damage(1-8) to (123-152)RequiresLevel 67, 134 DexGrants Skill: Azmerian Swarms (Level 19)Adds (48-59) to (75-97) Fire DamageAdds (35-53) to (65-80) Cold DamageAdds (1-8) to (123-152) Lightning Damage(8-14)% increased Attack SpeedElemental Damage from Hits Contributes to Flammability, Ignite, and Chill Magnitudes, Freeze Buildup, and Shock ChanceAs the Maji approached the edge of Nothingness, she strungfragments of the Wildwood's carcass together. When shenocked her arrow, she pulled upon the elements of life itself., Elemental, Ignite

The Three Dragons

Changes elemental contribution rules. Fire damage contributes to Shock instead, Cold damage contributes to Flammability and Ignite, and Lightning damage contributes to Freeze.

Evasion Rating(161-184)Energy Shield(51-59)RequiresLevel 45, 36 Dex, 36 Int(40-60)% increased Evasion and Energy Shield+(10-20)% to all Elemental ResistancesFire Damage from Hits Contributes to Shock Chance instead of Flammability and Ignite MagnitudesCold Damage from Hits Contributes to Flammability and Ignite Magnitudes instead of Chill Magnitude or Freeze BuildupLightning Damage from Hits Contributes to Freeze Buildup instead of Shock Chance"The ice seared his naked feetAs the lightning stilled his heart,But it was the flames upon his lover's faceThat roused him to vengeance."- From 'The Three Dragons' by Victario of Sarn, Shock, Freeze, Ignite

Increased magnitude

Blackgleam, Ashbark Talisman, Cinderbark Talisman, Soul Core of Puhuarte, The Searing Touch, and The Sentry provide different amounts of increased Flammability Magnitude.

Currency: Soul Core of Puhuarte, The Runefather's AlloyRelated: Blackgleam, Ashbark Talisman, Cinderbark Talisman, The Searing Touch, The Sentry, Increased versus more

Doubled magnitude

Candlemaker and Legacy of Candlemaker state that Flammability Magnitude is doubled. This is not the same calculation as adding another increased modifier.

Talisman augment

The Runefather's Alloy can make Lightning damage from Hits also contribute to Flammability and Ignite magnitudes when bonded to a Talisman.

Currency: The Runefather's AlloyRelated: Lightning, Ignite

Separate Ignite magnitude

After the chance roll succeeds, Ignite magnitude uses the final Fire damage dealt by the inflicting Hit under the Ignite rules. Flammability magnitude does not become the Ignite's damage.

Rare monster modifiers

1 linked

All Damage Ignites

Hits always Ignite. All Hit damage contributes to Flammability and Ignite magnitude.

Limits and exceptions

6 rules

Flammability magnitude is not Ignite damage.
Critical Hits do not inherently guarantee Ignite.
The same Hit can add Flammability and then use the new total for its own Ignite chance.
Every Flammability stack has an independent timer.
Total Flammability magnitude and Ignite chance are each capped at 100%.
A non-hit effect that Ignites as though dealing damage cannot Ignite below 50% Flammability magnitude.

Related mechanics

MechanicIgnite

Ignite is a damaging Elemental Ailment that deals Fire damage over time for four seconds by default. A Hit's chance to Ignite comes from the target's total Flammability, including Flammability applied by that same Hit.

MechanicMagnitude

Magnitude is the numeric strength of a Buff or Debuff. It changes the values that effect applies, such as damage per second, a Slow percentage, increased damage taken, or Ignite chance.

MechanicElemental

Elemental Damage is the collective name for Fire, Cold, and Lightning Damage. A modifier to Elemental Damage can scale all three types, but each part is still mitigated by its matching Resistance and keeps its own ailment rules.

MechanicFire

Fire Damage is one of the five damage types. Fire Hits apply Flammability, which supplies chance to Ignite, while Fire Resistance mitigates Fire Hits and Fire damage over time separately.

MechanicIgnited Ground

Ignited Ground repeatedly applies Flammability to enemies standing on it and Ignites them when total Flammability reaches 50%. Its default duration is 4 seconds and its default radius is 2 metres.