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Grievous Wounds is a debuff that reduces all of a unit's 
healing and 
health regeneration received by 40% or 60%.
Contents
Sources
Champion abilities
Katarina's Death Lotus (60%)- Kled's Bear Trap on a Rope (60%)
- Singed's Insanity Potion (40%)
- Varus' Hail of Arrows (40%)
Items
- Bramble Vest (40%)
- Chempunk Chainsword (40% / 60%)
- Chemtech Putrifier (40% / 60%)
- Executioner's Calling (40%)
- Morellonomicon (40% / 60%)
- Mortal Reminder (40% / 60%)
- Oblivion Orb (40%)
- Thornmail (40% / 60%)
Summoner Spells
- Ignite (60%)
Removing Grievous Wounds
Notes
- Shields are a way of temporarily adding health to a champion that is not reduced by Grievous Wounds.
- A champion debuffed by Grievous Wounds has the icon on top of them.
- The size of the icon is bigger based on the percentage application (60% has a much larger icon than the icon for 40%).
- Grievous Wounds does not stack; the duration of the debuff will overlap on separate effects and refresh on the same effect, while prioritizing the most potent application.
| Type |  Heal and Shield Power
|
 Spirit Visage
|
 Revitalize*
|
Grievous Wounds
|
|---|---|---|---|---|
| Health regeneration |
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 Life steal |
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 Omnivamp |
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| Physical vamp |
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 Drain effects |
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| Self heals | |
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| Self shields | |
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| Incoming heals | |
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| Incoming shields | |
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| Outgoing heals | |
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| Outgoing shields | |
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 Bonus health |
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Strategy
- Grievous Wounds is generally used to limit or minimize the healing, omnivamp, or life steal of one enemy champion ability such as Darius' Decimate, Renekton's Cull the Meek or Sylas' Kingslayer. It can also weaken burst healing champions such as Aatrox, Dr. Mundo, Fiora, Swain, Trundle, Vladimir, Warwick, or Zac.
- Grievous Wounds isn't only useful against champions with in-built sustain. Some can build viable items or take runes that give them sustain, such as Ravenous Hydra, Bloodthirster, Conqueror, or Legend: Bloodline. Grievous Wounds is also useful against them. This is important to notice especially in situations where technically there are no champions with natural sustain on the enemy team, but they may own or have sources of bonus effects that would grant them sustain.
- On the other hand, some champions only have sustain when out of combat. This includes Garen, Tahm Kench, and champions that build Warmog's Armor. Grievous Wounds is not effective against those champions (as the debuff usually doesn't last long enough for it to have effect on them); the most effective way to prevent them from healing is to force them to stay in combat.
- It is important to note that Grievous Wounds also affects healing from outside sources instead of just self-healing. This is especially important against Soraka, which can use Astral Infusion to out-sustain her enemies, even if her allies don't have sustain themselves.
- Grievous Wounds isn't only useful against champions with in-built sustain. Some can build viable items or take runes that give them sustain, such as
- Grievous Wounds is dispelled by Sion's Glory in Death and death. It will however persist through resurrection effects (e.g. Zilean's Chronoshift, Guardian Angel).
Trivia
- Singed's Poison Trail during Insanity Potion is the only ability that can apply Grievous Wounds to non-champions.
- Kled's Bear Trap on a Rope can apply Grievous Wounds to large monsters.
Patch History
- New source of Grievous Wounds:
- Grievous Wounds can now be cleared with:
- New sources of Grievous Wounds:
- Can now also apply a 60% healing debuff on:
- Death Lotus healing debuff increased to 60% from 40%.
- Bear Trap on a Rope healing debuff increased to 60% from 40%.
- Now affects healing from all sources instead of self-healing.
- Now only affects self-healing from healing from all sources.
- Healing reduction reduced to 40% from 50%.
