Ignite is a targeted summoner spell that deals a moderate amount of true damage over 5 seconds and reduces healing on the target by 40% for the duration, revealing them for the duration.
Overview
Ignite provides players an offensive utility and damage spell that scales with level. Throughout Season 2 and Season 3, it was a popular spell for creating a greater margin for a kill in an all-in attack, particularly useful on burst-centric champions such as mages or assassins, where a kill combo typically treads the boundary of finishing a full-health or nearly full-health opponent. In the second half of Season 3, it began to see increasing use in the support role for playstyles prone to aggressive all-ins. The changes to 
Heal and 
Exhaust in Season 4 have provided powerful tools to defend against all-ins, causing Ignite to fall out of favor among all but the most aggressive roles and weakening aggressive champions and strategies overall.
A well-placed healing reduction debuff from Ignite can severely limit the effectiveness of enemy healing items, as well as healing abilities from champions like 
Soraka, 
Vladimir, 
Volibear, and 
Warwick. It is considered a direct counter to 
Dr. Mundo, Soraka, and 
Swain because they are reliant on their healing-based abilities and ultimates. The healing reduction debuff also applies to life steal and spell vamp effects from items and abilities such as 
The Bloodthirster and 
Morgana's 
Soul Siphon.
It should be noted that Ignite deals true damage and therefore cannot be mitigated by any form of damage reduction, although shields will take priority over health for absorbing the damage.
Effectiveness comparison
The following table compares the effectiveness of 
Barrier vs Heal on a target affected by Ignite.
| Ignite
|
Barrier
|
Heal
| |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Level | Total damage | Damage per second | Absorbed damage | Absorbed damage in 2 seconds | Received Damage | Percentage of Damage Negated | Healing | Reduced healing ( GW)
|
Received Damage | Percentage of Damage Negated | |
| 1 | 70 | 14 | 115 | 28 | 42
|
40% | 90 | 54 | 16
|
77.1% | |
| 2 | 90 | 18 | 135 | 36 | 54
|
40% | 105 | 63 | 27
|
70% | |
| 3 | 110 | 22 | 155 | 44 | 66
|
40% | 120 | 72 | 38
|
65.5% | |
| 4 | 130 | 26 | 175 | 52 | 78
|
40% | 135 | 81 | 49
|
62.3% | |
| 5 | 150 | 30 | 195 | 60 | 90
|
40% | 150 | 90 | 60
|
60% | |
| 6 | 170 | 34 | 215 | 68 | 102
|
40% | 165 | 99 | 71
|
58.2% | |
| 7 | 190 | 38 | 235 | 76 | 114
|
40% | 180 | 108 | 82
|
56.8% | |
| 8 | 210 | 42 | 255 | 84 | 126
|
40% | 195 | 117 | 93
|
55.7% | |
| 9 | 230 | 46 | 275 | 92 | 138
|
40% | 210 | 126 | 104
|
54.8% | |
| 10 | 250 | 50 | 295 | 100 | 150
|
40% | 225 | 135 | 115
|
54% | |
| 11 | 270 | 54 | 315 | 108 | 162
|
40% | 240 | 144 | 126
|
53.3% | |
| 12 | 290 | 58 | 335 | 116 | 174
|
40% | 255 | 153 | 137
|
52.8% | |
| 13 | 310 | 62 | 355 | 124 | 186
|
40% | 270 | 162 | 148
|
52.3% | |
| 14 | 330 | 66 | 375 | 132 | 198
|
40% | 285 | 171 | 159
|
51.8% | |
| 15 | 350 | 70 | 395 | 140 | 210
|
40% | 300 | 180 | 170
|
51.4% | |
| 16 | 370 | 74 | 415 | 148 | 222
|
40% | 315 | 189 | 181
|
51.1% | |
| 17 | 390 | 78 | 435 | 156 | 234
|
40% | 330 | 198 | 192
|
50.8% | |
| 18 | 410 | 82 | 455 | 164 | 246
|
40% | 345 | 207 | 203
|
50.5% | |
Barrier will always negate 40% of Ignite's damage if it is activate while under the effect of Ignite for at least 2 seconds. Heal will always negate more damage than Barrier. Note that Heal will absorb a larger portion of Ignite's damage at lower levels.
Notes
Cleanse removes the damage-over-time component of Ignite, but not the healing reduction.- Ignite's healing debuff does not reduce shields or health boosts like Janna's Eye of the Storm or Lulu's Wild Growth.
- Multiple uses of Ignite on the same target will refresh its duration and does not provide a stacking effect.
- Ignite does not stack with any other abilities that apply Grievous Wounds, such as Varus' Hail of Arrows.
- Taking Damage from ignite interrupts Recall as of patch V5.3; other channeled abilities are unaffected.
- The cooldown of this spell can be reduced by the Cosmic Insight mastery or by Ionian Boots of Lucidity.
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Trivia
- The icon for Ignite shows great resemblance to Annie's Pyromania since they are both icons of a hand holding a flame.
- Ignite and Chilling Smite are the only 2 summoner spells that can deal direct damage to enemy champions.
Patch History
- Level requirement reduced to 9 from 10.
- Grievous Wounds
- Reduces all healing received by 40%.(Previous change from V5.22 reverted.)
- Grievous Wounds
- Reduced to 40% healing reduction from 50% healing reduction.
- Grievous Wounds now only affects self-healing instead of all healing.
- Ignite now interrupts champions who attempt to recall while Ignited.
- Reveals target for the duration.
Doesn't reveal stealth.- Bug: Stealthed targets are revealed.
- New particles.
- Cooldown increased to 210 seconds from 180.
- Now only usable on enemy champions.
- No longer usable on minions (still usable on jungle monsters).
- Now removes stealth when used.
- The damage over time can now be removed by Cleanse.
- Fixed a bug where its visual effect would sometimes persist far beyond the actual duration.
- Now removes stealth when used.
- Fixed a bug where itcould be cast while in stasis from Zhonya's Ring.
- Damage per level reduced to 20 from 25.
- Can no longer be removed by Cleanse.
- Fixed a bug with the tooltip cooldown value that made it seem shorter than it actually is.
- Can now be removed by Cleanse.
- Now also reduces the target’s healing and regeneration by 50%.
- Fixed an issue that prevented Ignite from being cast while silenced.
- Range increased to 600 from 550.
- V0.9.25.24 Added
- Deals 50 damage plus 25 damage per level over 5 seconds. This damage is not lowered by armor or magic resistance.
- Burning Embers (mastery): While your Ignite spell is on cooldown, your champion has an additional 10 ability power.
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