League of Legends Wiki

Don't like ads?
Sign up for an account, and turn off ads in Special:Preferences.

Come join the LoL Wiki community Discord server!

READ MORE

League of Legends Wiki
Advertisement
League of Legends Wiki

Magic penetration icon.png Magic penetration is a champion statistic that dictates how much of the target's Magic resistance icon.png magic resistance will be ignored when the user deals magic damage. Percentage magic penetration and flat magic penetration have no effect if the target's magic resistance is less than or equal to 0.

Magic resistance reduction is an effect which reduces the target's magic resistance by an amount for a period of time. Flat magic resistance reduction can reduce the value below 0, percentage magic resistance reduction cannot.

All champions have 0 base magic penetration, but it can be increased with items, runes, and some champion abilities.

Order of calculations

Magic penetration and magic resistance reduction are considered in the following order:[1]

  1. Magic resistance reduction, flat.
  2. Magic resistance reduction, percentage.
  3. Magic penetration, percentage.
  4. Magic penetration, flat.

Flat magic resistance reduction

The target's magic resistance is reduced by an amount. Flat magic resistance reduction Additive stacking icon.png stacks additively.

Example: 20 magic resistance reduction reduces the target's magic resistance by 20, so a target with 30 magic resistance will be reduced to 10 magic resistance. (30 − 20 = 10)

Flat magic resistance reduction can reduce a target's magic resistance below zero. For example, if an enemy with 10 magic resistance has their magic resistance reduced by 25, the enemy will have −15 magic resistance.

Percentage magic resistance reduction

The target's magic resistance is multiplied by a percentage (100% − the listed reduction). Percentage magic resistance reduction Multiple stacking icon.png stacks multiplicatively and is ignored if the target's magic resistance is 0 or less.

Example: 20% magic resistance reduction multiplies the target's magic resistance to 80%, so a target with 30 magic resistance will be reduced to 24 magic resist. (30 × 0.8 = 24)

Percentage magic resistance reduction reduces more magic resistance on targets with higher magic resistance. For instance, with 40% magic resistance reduction, a target with 200 magic resistance will lose 80 while a target with only 50 magic resistance will lose 20.

Percentage magic penetration

The target's magic resistance is treated as being multiplied by a percentage for purposes of damage calculation (100% − the listed penetration). Percentage magic penetration Multiple stacking icon.png stacks multiplicatively and is ignored if the target's magic resistance is 0 or less.

Example: 20% magic penetration causes the target to take damage as if its magic resistance was multiplied by 80%, so a target with 30 magic resistance will be treated as though it had 24 for purposes of damage calculation (the target's actual magic resistance value will not change, however).

Because the target's actual magic resistance value does not change, anything else depending on that value also doesn't change.

Percentage magic penetration reduces more magic resistance on targets with higher magic resistance. For instance, with 40% magic penetration, a target with 200 magic resistance will be considered as having 80 less while a target with only 50 magic resistance will be considered as having 20 less.

Gold Value ​​

  • Percentage magic penetration has a gold value of 47.08 Gold 47.08 per point.

Flat magic penetration

The target's magic resist is treated as being reduced by an amount for purposes of damage calculation, but cannot be reduced below 0. Flat magic penetration Additive stacking icon.png stacks additively.

Example: 20 magic penetration causes the target to take damage as if its magic resistance was 20 less, so a target with 30 magic resistance will be treated as though it had 10 for purposes of damage calculation (the target's actual magic resistance value will not change, however).

Because the target's actual magic resistance value does not change, anything else depending on that value also doesn't change.

Gold Value ​​

  • Flat magic penetration has a gold value of 31.11 Gold 31.11 per point.

Examples

Given 10 flat magic penetration and 35% magic penetration, and the target is affected by 20 flat magic resistance reduction and 30% magic resistance reduction;

  • Target A has 80 magic resistance.
    • The 80 is reduced to 60 by the 20 magic resistance reduction.
    • The 60 is reduced to 42 by the 30% magic resistance reduction.
    • The 42 is considered to be 27.3 by the 35% magic resistance penetration.
    • The 27.3 is considered to be 17.3 by the 10 magic resistance penetration.
Target A takes damage as if it has 17.3 magic resistance.
  • Target B has 18 magic resistance.
    • The 18 is reduced to −2 by the 20 magic resistance reduction.
    • The −2 is not affected by any further calculations because it is less than 0.
      • Target B takes damage as if it has −2 magic resistance.

Increasing magic penetration

Champion abilities

Items

This table is automatically generated based on the data from Module:ItemData/data.

ItemCostAmountAvailability
Blighting Jewel Blighting Jewel1250 1250 Gold15%All maps
Eye of Luden Eye of Luden3200 3200 Gold10All maps
Hextech Rocketbelt Hextech Rocketbelt3200 3200 Gold6All maps
Luden's Tempest Luden's Tempest3200 3200 Gold6All maps
Sorcerer's Shoes Sorcerer's Shoes1100 1100 Gold18All maps
Upgraded Aeropack Upgraded Aeropack3200 3200 Gold10All maps
Void Staff Void Staff2700 2700 Gold40%All maps

Item passives

Runes

Reducing magic resistance

Champion abilities

Percentage reduction
Flat reduction

Monsters

Flat reduction

Notes

  • Magic penetration will apply to any and all sources of Magic damage.png magic damage.
    • It will apply to the damage dealt to any unit, including Turret icon.png turrets.
  • Magic resistance reduction will affect the magic damage from any unit source.
  • Percentage penetration is applied before flat penetration.

Trivia

The highest amount of flat magic penetration any champion can obtain is 54.

The highest amount of percentage magic penetration any champion can obtain is 55%.

  • Items:
  • Relevant mathematics:
    • Items: = (1 - 0.4 0.4) × (1 - 0.25) = 0.45
      • 1 - 0.45 = 55% magic penetration
  • The highest amount obtainable in the game is 61.75% with Mordekaiser Mordekaiser when Death's Grasp Death's Grasp (max rank) is included in the equation.
    • Relevant mathematics:
      • (1 - 0.4 0.4) × (1 - 0.25) × (1 - 0.15 0.15) = 0.3825
        • 1 - 0.3825 = 61.75% magic penetration

Media

See also

References

Advertisement