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Magic resistance

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Magic resistance (or MR) is a stat that all units have, including minions, monsters, and buildings. Increasing magic resistance reduces the magic damage the unit takes. Each champion begins with some magic resistance which may increase with level. You can gain additional magic resistance from abilities, items, masteries, and runes. Magic resistance stacks additively.

All champions begin with 30 base magic resistance. Currently no ranged champion gains magic resistance per level, but most melee champions do except KassadinSquare.png Kassadin, MaokaiSquare.png Maokai, PoppySquare.png Poppy, and YasuoSquare.png Yasuo.

EliseSquare.png Elise, GnarSquare.png Gnar, JayceSquare.png Jayce, KayleSquare.png Kayle and NidaleeSquare.png Nidalee do not gain magic resistance per level because they are not always melee champions due to their variable attack range.

All champions that do gain magic resistance per level gain 1.25 magic resistance per level, reaching 53.4 base magic resistance at level 18.

Damage reduction

Magic Resistance reduces the damage of incoming magical attacks by a percentage. This percentage is determined by the formula: Damage Reduction = Total Magic Resistance / (100 + Total Magic Resistance). For example, a champion with 150 points of magic resistance would receive 60% reduced damage from magical attacks. Incoming magic damage is multiplied by a factor based on the unit's magic resistance(same with armor):

$${\rm Damage\ multiplier}=\begin{cases} {100 \over 100+{\it MR}}, & {\rm if\ }{\it MR} \geq 0\\ 2 - {100 \over 100 - {\it MR}}, & {\rm otherwise} \end{cases}$$

Examples:

  • 25 magic resistance → × 0.8 incoming magic damage (20% reduction).
  • 100 magic resistance → × 0.5 incoming magic damage (50% reduction).
  • −25 magic resistance → × 1.2 incoming magic damage (20% increase).

Stacking magic resistance

Every point of magic resistance requires a unit to take 1% more of its maximum health in magic damage to be killed. This is called "effective health."

Example: A unit with 60 magic resistance has 160% of its maximum health in its effective health, so if the unit has 1000 maximum health, it will take 1600 magic damage to kill it.

What this means: by definition, magic resistance does not have diminishing returns, because each point increases the unit's effective health against magic damage by 1% of its current actual health value whether the unit has 10 magic resistance or 1000 magic resistance.

For a more detailed explanation, see this video.

Unlike health, increasing magic resistance makes healings and shields more effective because it requires more effort from your enemies to remove the bonus health granted. This is called indirect scaling.


Magic Resistance as Scaling

These use the champion's magic resistance to increase the magnitude of the ability. It could involve total or bonus magic resistance. By building magic resistance items, you can receive more benefit and power from these abilities.

Champions

  • BraumSquare.png Braum's Stand Behind Me.png Stand Behind Me grants magic resistance equal to 10 / 11.5 / 13 / 14.5 / 16% of his bonus magic resistance to himself and the target ally (in addition to a base amount) for 3 seconds.
  • GalioSquare.png Galio's Runic Skin.png Runic Skin grants him bonus ability power equal to 50% of his total magic resistance.
  • LeonaSquare.png Leona's Eclipse.png Eclipse grants additional magic resist equal to 20 / 30 / 40 / 50 / 60 + (20% of her bonus magic resistance for its duration.
  • TrundleSquare.png Trundle's Subjugate.png Subjugate takes 40% of the target's magic resistance and gains an equal amount of magic resistance. Half of this magic resistance is stolen on cast, and the next half is taken over 4 seconds. The magic resistance bonus/reduction lasts for another 4 seconds after the drain completes.

Items


Increasing magic resistance

Items

  • Abyssal Scepter item.png Abyssal Scepter: +50 magic resistance, +70 ability power. Unique Aura: Reduces the magic resistance of nearby enemies by 20. 2440 Gold.
  • Aegis of the Legion item.png Aegis of the Legion: +20 magic resistance. Unique Aura – Legion: Nearby allies gain 20 magic resist, and +75% base health regeneration. +200 health. 1900 Gold.
  • Athene's Unholy Grail item.png Athene's Unholy Grail: +25 magic resistance, +60 ability power, +100% base mana regeneration, +20% cooldown reduction. Unique Passive: Restores 30% of your maximum mana on kill or assist. Unique Passive – Mana Font: Restores 2% of missing mana every 5 seconds. 2700 Gold.
  • Banner of Command item.png Banner of Command: +20 magic resistance. Unique Aura - Legion: Nearby allies gain 20 magic resist, and +75% base health regen. +200 health, +60 ability power, +10% cooldown reduction. Unique Active – Promote: Greatly increases the power of a lane minion and grants it immunity to magic damage (120 second cooldown) (1200 range). 3000 Gold.
  • Chalice of Harmony item.png Chalice of Harmony: +25 magic resistance, +50% base mana regeneration. Unique Passive – Mana Font: Restores 2% of missing mana every 5 seconds. 900 Gold.
  • Hexdrinker item.png Hexdrinker: +30 magic resistance, +25 attack damage. Unique Passive – Lifeline: Upon taking magic damage that would reduce health below 30%, grants a shield that absorbs 250 magic damage for 5 seconds (90 second cooldown). 1450 Gold.
  • Locket of the Iron Solari item.png Locket of the Iron Solari: +20 magic resistance. Unique Aura - Legion: Nearby allies gain 20 magic resist, and +75% base health regen. +400 health, +10% cooldown reduction. Unique Active: Shield yourself and nearby allies for 5 seconds, absorbing up to 50 + (10 × level) damage (60 second cooldown). 2800 Gold.
  • Maw of Malmortius item.png Maw of Malmortius: +40 magic resistance, +60 attack damage. Unique Passive: Grants +1 attack damage for every 2% of missing health, up to a maximum of 35 attack damage. Unique Passive – Lifeline: Upon taking magic damage that would reduce health below 30%, grants a shield that absorbs 400 magic damage for 5 seconds (90 second cooldown). 3200 Gold.
  • Mercury's Treads item.png Mercury's Treads: +25 magic resistance. Unique Passive – Enhanced Movement: +45 movement speed. Unique Passive - Tenacity: Reduces the duration of stuns, slows, taunts, fears, silences, blinds and immobilizes by 35%. 1200 Gold.
  • Mikael's Crucible item.png Mikael's Crucible: +40 magic resistance, +100% base mana regeneration, +10% cooldown reduction. Unique Passive – Mana Font: Restores 2% of missing mana every 5 seconds. Unique Active: Removes all stuns, roots, taunts, fears, silences and slows on an allied champion and heals that champion for 150 + (10% of the target's maximum health) (180 second cooldown). 2450 Gold.
  • Negatron Cloak item.png Negatron Cloak: +45 magic resistance. 850 Gold.
  • Null-Magic Mantle item.png Null-Magic Mantle: +25 magic resistance. 500 Gold.
  • Quicksilver Sash item.png Quicksilver Sash: +30 magic resistance. Unique Active – Quicksilver: Removes all debuffs from your champion (90 second cooldown). 1250 Gold.
  • Spectre's Cowl.png Spectre's Cowl: +35 magic resistance, +200 health. Unique Passive: Grants 150% base health regen for up to 10 seconds after taking damage from an enemy champion. 1200 Gold.
  • Spirit Visage item.png Spirit Visage: +55 magic resistance, +400 health, +100% base health regeneration, +10% cooldown reduction. Unique Passive: Increases effectiveness of all sources of healing including self-healing, health regen, life steal and spell vamp by 20%. 2750 Gold.
  • Wit's End item.png Wit's End: +30 magic resistance. Unique Passive: Your basic attacks steal 5 magic resistance of the target for 5 seconds (stacks up to 5 times). +50% attack speed. Unique Passive: Your basic attacks deal 42 bonus magic damage. 2600 Gold.


Variable Availability

  • STH Banshee's Veil item.png Banshee's Veil: +60 magic resistance, +450 health, +100% base health regeneration. Unique Passive: Grants a spell shield that blocks the next enemy ability. This shield refreshes after no damage is taken from enemy champions for 40 seconds. 2700 Gold.
  • TC Dervish Blade item.png Dervish Blade: +45 magic resistance, +50% attack speed, +10% cooldown reduction. Unique Active – Quicksilver: Removes all debuffs from your champion. Melee champions also gain +50% movement speed for 1 second (90 second cooldown). 2700 Gold.
  • SC Guardian Angel item.png Guardian Angel: +50 magic resistance, +50 armor. Unique Passive: Upon taking lethal damage, restores 30% of maximum health and 30% of maximum mana after 4 seconds of stasis (5 minute cooldown). 2850 Gold.
  • H Guardian's Horn item.png Guardian's Horn: Unique Active – Battle Cry: Gain 20 magic resistance, 30% movement speed, and 20 armor for 3 seconds (25 second cooldown). +200 health, +125% base health regeneration. 1015 Gold.
  • SH Mercurial Scimitar item.png Mercurial Scimitar: +35 magic resistance, +80 attack damage. Unique Active – Quicksilver: Removes all debuffs and also grants 50% bonus movement speed for 1 second (90 second cooldown). 3700 Gold.
  • TC Moonflair Spellblade item.png Moonflair Spellblade: +50 magic resistance, +50 ability power, +50 armor. Unique Passive – Tenacity: Reduces the duration of stuns, slows, taunts, fears, silences, blinds, polymorphs, and immobilizes by 35%. 2620 Gold.
  • C Odyn's Veil item.png Odyn's Veil: +50 magic resistance, +350 health, +350 mana. Unique Passive: Reduces and stores 10% of magic damage received. Unique Active: Deals 200 + (stored magic damage – max 200) magic damage to nearby enemy units (90 second cooldown). 2500 Gold.
  • H Orb of Winter item.png Orb of Winter: +70 magic resistance, +100% base health regeneration. Unique Passive: Grants a shield that absorbs up to 30 + (10 × level) damage. The shield will refresh after 9 seconds without receiving damage. 2200 Gold.
  • S Zz'Rot Portal item.png Zz'Rot Portal: +60 magic resistance, +60 armor, +100% base health regen. Unique Passive – Point Runner: Build up to +30% movement speed over 2 second while near turrets or Void Gates (including fallen turrets). Unique Active: Spawns a Void Gate at target location for 150 seconds. Every 4 seconds the gate makes a VoidspawnSquare.png Voidspawn that travels down the nearest lane and decays over time. Voidspawn explodes when attacking structures. VoidspawnSquare.png Voidspawn ignore champions and void targets (150 second cooldown). The first and every fourth voidspawn gain 100% of armor and magic resistance as damage. 2800 Gold.


Champion abilities

Note: Only the magic resist buff effect of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.

  • AniviaSquare.png Anivia's Rebirth.png Rebirth allows her to enter an egg-state for up to 6 seconds upon taking lethal damage. While in this state, she will receive a magic resistance modifier of −40 / −25 / −10 / +5 / +20.
  • AnnieSquare.png Annie's Molten Shield.png Molten Shield increases her magic resistance by 10 / 20 / 30 / 40 / 50 for 5 seconds.
  • BraumSquare.png Braum's Stand Behind Me.png Stand Behind Me increases magic resistance by 15 / 17.5 / 20 / 22.5 / 25 + (10% / 11.5% / 13% / 14.5% / 16% bonus magic resistance) to himself and the target ally for 3 seconds.
  • GalioSquare.png Galio's Bulwark.png Bulwark increases an allied champion's magic resistance by 30 / 45 / 60 / 75 / 90 for 4 seconds.
  • GnarSquare.png Gnar's Rage Gene.png Rage Gene increases his magic resistance by (2 × Gnar's level) when transformed into Mega GnarSquare.png Mega Gnar.
  • GarenSquare.png Garen's Courage.png Courage increases his magic resistance equal to 20% of bonus magic resistance.
  • GravesSquare.png Graves's True Grit.png True Grit increases his magic resistance by 1 / 2 / 3 every second he remains in combat. This bonus stacks up to 10 times for a maximum of 10 / 20 / 30. Graves is considered in combat if he has dealt or received damage in the last 3 seconds.
  • JaxSquare.png Jax's Grandmaster's Might.png Grandmaster's Might increases his magic resistance by 30 / 50 / 70 + (20% AP) for 8 seconds.
  • KennenSquare.png Kennen's Lightning Rush.png Lightning Rush increases his magic resistance by 10 / 20 / 30 / 40 / 50 for 4 seconds.
  • JayceSquare.png Jayce's Transform- Mercury Hammer.png Transform: Mercury Hammer increases his magic resistance by 5 / 15 / 25 / 35.
  • LeonaSquare.png Leona's Eclipse.png Eclipse increases her magic resistance by 20 / 30 / 40 / 50 / 60 + (20% bonus magic resistance) for 3 seconds, deals damage after that time to units around her, and retains the defensive buff for an additional 3 seconds if any enemy is struck by the blast.
  • MordekaiserSquare.png Mordekaiser's Creeping Death.png Creeping Death increases an allied unit's magic resistance by 10 / 15 / 20 / 25 / 30 for 6 seconds.
  • OlafSquare.png Olaf's Ragnarok.png Ragnarok passively increases his magic resistance by 10 / 20 / 30. He loses the passive while his ability is active.
  • OriannaSquare.png Orianna's Command- Protect.png Command: Protect increases an allied champion's magic resistance by 10 / 15 / 20 / 25 / 30 as long as the ball is attached to it.
  • RammusSquare.png Rammus's Defensive Ball Curl.png Defensive Ball Curl increases his magic resistance by 40 / 60 / 80 / 100 / 120 for 6 seconds.
  • RengarSquare.png Rengar's Battle Roar.png Battle Roar lets out a battle roar, damaging enemies increases his magic resist by 10 / 15 / 20 / 25 / 30 for each enemy champion or large monster hit for 4 seconds.
  • ShyvanaSquare.png Shyvana's Dragonborn.png Dragonborn passively increases her magic resistance by 5 / 10 / 15 / 20. This bonus is doubled while she is in dragon form (20 / 30 / 40).
  • SingedSquare.png Singed's Insanity Potion.png Insanity Potion increases his magic resistance by 35 / 50 / 80 for 25 seconds.
  • TrundleSquare.png Trundle's Subjugate.png Subjugate immediately steals 20% of the target's magic resistance, and a further 20% over 4 seconds. These magic resistance bonuses lasts for another 4 seconds after the drain completes.
  • UrgotSquare.png Urgot's Hyper-Kinetic Position Reverser.png Hyper-Kinetic Position Reverser increases his magic resistance by 60 / 90 / 120 for 5 seconds.
  • WukongSquare.png Wukong's Stone Skin.png Stone Skin grants him 4 / 6 / 8 magic resistance for each visible nearby enemy champion.
  • XinZhaoSquare.png Xin Zhao's Crescent Sweep.png Crescent Sweep increases his magic resistance by 15 / 20 / 25 for each enemy champion hit for 8 seconds.


Masteries

  • Enchanted Armor mastery s4.png Enchanted Armor increases your bonus armor and magic resistance by 2.5 / 5 / 7.5 / 10%.
  • Resistance mastery s4.png Resistance grants 2 / 3.5 / 5 magic resistance.
  • Legendary Guardian mastery s4.png Legendary Guardian grants 3 armor and 3 magic resistance for each visible enemy champion within 700 units.


Runes

Name Type Tier 1 (Lesser) Tier 2 (Normal) Tier 3 (Greater)
Magic Resist Mark

GMarks (2)

X X 0.77

205 IP

Seal

GSeals (3)

0.41

5 IP

0.58

35 IP

0.74

205 IP

Glyph

GGlyphs (3)

0.74

5 IP

1.04

35 IP

1.34

205 IP

Quintessence

GQuintessences (1)

2.22

15 IP

3.11

100 IP

4

1025 IP

Magic Resist, Scaling

(Magic Resist per level)

Mark

GMarks (4)

X X 0.07 per level (1.26)

205 IP

Seal

GSeals (2)

X X 0.1 per level (1.8)

410 IP

Glyph

GGlyphs (4)

X X 0.16 per level (2.88)

205 IP

Quintessence

GQuintessences (4)

X X 0.37 per level (6.66)

1025 IP



Other

  • Disconnecting gives approximately +1000 magic resistance after a delay.

Ways to reduce magic resistance

See magic penetration. Note that magic penetration and magic resistance reduction are different.

List of champions' magic resistance


  • 61 champions start with 32.1 base magic resistance at level one, and at 53.4 base magic resistance at level 18. These champion are all melee champions, without exception.

Trivia

[Last updated 16/7/2015 on patch 5.13]

  • One of the biggest amount of magic resistance any champion can obtain is 1067.957984 (which reduces magical damage by 91.438%), being a level 18 RammusSquare.png Rammus in the Howling Abyss.

RammusSquare.png Rammus must:

Relevant mathematics:
BraumSquare.png Braum Bonus Magic Resist (before Stand Behind Me.png Stand Behind Me) = (70 × 6 + 20 + 3 × 5 + 5 + 1.26 × 9 + 1.8 × 9 + 2.88 × 9 + 6.66 × 3) × 1.10 = 586.784
RammusSquare.png Rammus Magic Resist = ((70 × 6 + 20 + 3 × 5 + 5 + 90 + 30 + 30 + (25 + 586.784 × 0.16) + 1.26 × 9 + 1.8 × 9 + 2.88 × 9 + 6.66 × 3 + 120) × 1.10) + 53.4 = 1067.957984


Having an enemy TrundleSquare.png Trundle with the same setup use Subjugate.png Subjugate on RammusSquare.png Rammus will yield a total of 1405.859497 magic resistance. This may be the highest possible finite amount of magic resist(without using metagame effects—see below), and reduces magic damage by 93.359%.
Relevant mathematics:

RammusSquare.png Rammus Magic Resist = ((70 × 6 + 20 + 3 × 5 + 5 + 90 + 30 + 30 + (25 + 586.784 × 0.16) + 1.26 × 9 + 1.8 × 9 + 2.88 × 9 + 6.66 × 3 + 120) × 1.10) + 53.4 = 1067.957984
TrundleSquare.png Trundle Magic Resist = ((70 × 6 + 20 + 3 × 5 + 5 + 90 + 30 + 30 + (25 + 586.784 × 0.16) + 1.26 × 9 + 1.8 × 9 + 2.88 × 9 + 6.66 × 3 + (1067.957984 × 0.4)) × 1.10) + 53.4 = 1405.859497


It is still possible to go higher through metagame functions. If a summoner disconnects from the server and is in the fountain, his/her champion will gain 1000 magic resistance. With the same setup as above, a disconnected RammusSquare.png Rammus will have approximately 2068 magic resist. TrundleSquare.png Trundle cannot exceed this. This reduces magical damage by 95.387%.


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