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Ability power

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Ability power (AP) is a champion statistic that increases the effectiveness of most abilities. It stacks additively.

Effects that benefit from ability power receive a bonus based on a certain percentage of a champion's current ability power. For example, if a spell deals 100 (+20% AP) damage and a champion has 50 ability power, the spell's damage will increase by 10. In-game, spell descriptions do not display the percentage, but do display the resulting bonus; the previous example would display as 100 (+10).

Increasing Ability Power

Items

  • Abyssal Scepter item.png Abyssal Scepter: +70 ability power, +50 magic resistance. Unique Aura: Reduces the magic resistance of nearby enemies by 20. 2440 gold.
  • Aether Wisp item.png Aether Wisp: +30 ability power. Unique Passive: +5% movement speed. 850 gold.
  • Amplifying Tome item.png Amplifying Tome: +20 ability power. 435 gold.
  • Archangel's Staff item.png Archangel's Staff: +80 ability power. Unique Passive – Insight: Grants (3% of your maximum mana) ability power. +250 mana, +50% base mana regeneration. Unique Passive – Mana Charge: Each time you cast a spell or spend mana, grants +8 / 10 maximum mana (occurs up to 2 times every 8 / 6 seconds). Transforms into Seraph's Embrace item.png Seraph's Embrace at +750 mana. 3000 gold.
  • Ardent Censer item.png Ardent Censer: +40 ability power, +100% base mana regeneration, +10% cooldown reduction. Unique Passive: +8% movement speed. Unique Passive: Your heals and shields on another unit grant them 15% attack speed and 30 magic damage on-hit for 6 seconds. This does not include regeneration effects or effects on yourself. 2100 gold.
  • Athene's Unholy Grail item.png Athene's Unholy Grail: +60 ability power, +25 magic resist, +20% cooldown reduction, +100% base mana regeneration. 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: +60 ability power, +200 health, +20 magic resist, +10% cooldown reduction. Unique Aura – Legion: Grants nearby allies +20 magic resist and +75% base health regen. Unique Active – Promote: Greatly increases the power of a lane minion and grants it immunity to magic damage (120 second cooldown). 3000 gold.
  • Blasting Wand item.png Blasting Wand: +40 ability power. 860 gold.
  • Fiendish Codex item.png Fiendish Codex: +30 ability power. Unique Passive: +10% cooldown reduction. 820 gold.
  • Frost Queen's Claim item.png Frost Queen's Claim: +50 ability power, +50% base mana regeneration, +10% cooldown reduction, +2 gold per 10 seconds. Unique Passive – Tribute: Spells and basic attacks against champions or buildings deal 15 additional damage and grant 10 gold. This can occur up to 3 times every 30 seconds. Unique Active: Fires an ice lance that explodes dealing 50 + (5 × level) magic damage to nearby enemies and slowing their movement speed by 80%, decaying over 2 seconds (850 range) (225 radius) (60 second cooldown). You may only be in possession of 1 Gold Income item. 2200 gold.
  • Frostfang item.jpg Frostfang: +10 ability power, +50% base mana regeneration, +2 gold per 10 seconds. Unique Passive – Tribute: Spells and basic attacks against champions or buildings deal 15 additional damage and grant 10 gold. This can occur up to 3 times every 30 seconds. Killing a minion disables this passive for 12 seconds. 865 gold.
  • Guinsoo's Rageblade item.png Guinsoo's Rageblade: +40 ability power, + 30 attack damage. Passive: Basic attacks and spell casts grants +4% attack speed and +4 ability power for 8 seconds (stacks up to 8 times). Unique Passive: Falling below 50% health grants you +20% attack speed, +10% life steal, and +10% spell vamp until out of combat (30 second cooldown). 2600 gold.
  • Haunting Guise item.png Haunting Guise: +25 ability power, +200 health. Unique Passive – Eyes of Pain: +15 magic penetration. 1500 gold.
  • Hextech Gunblade item.png Hextech Gunblade: +80 ability power, +40 attack damage, +10% life steal. Unique Passive : +20% spell vamp. Unique Passive: Basic attacks and single target spells against champions reduce the cooldown of this item by 3 seconds. Unique Active: Deals 150 + (40% AP) magic damage and slows the target champion's movement speed by 40% for 2 seconds (700 range) (60 second cooldown). 3400 gold.
  • Hextech Revolver item.png Hextech Revolver: +40 ability power. Unique Passive: +12% spell vamp. 1200 gold.
  • Iceborn Gauntlet item.png Iceborn Gauntlet: +30 ability power, +60 armor, +10% cooldown reduction, +500 mana. Unique Passive – Spellblade: After using an ability, the next basic attack (on hit) deals 125% base AD bonus physical damage to enemies near the target, and creates a field around the target for 2 seconds that slows enemy movement speed by 30% (1.5 second cooldown) (half-sized field if ranged). 2900 gold.
  • Liandry's Torment item.png Liandry's Torment: +80 ability power, +300 health. Unique Passive – Eyes of Pain: +15 magic penetration. Unique Passive: Dealing spell damage applies a damage-over-time effect for 3 seconds that deal 2% of target's current health bonus magic damage per second. This bonus damage is doubled against movement-impared units and capped at 100 damage per second vs. monsters. 3000 gold.
  • Lich Bane item.png Lich Bane: +80 ability power, +250 mana, +5% movement speed. Unique Passive – Spellblade: After using an ability, the next basic attack deals (75% base AD) + (50% AP) bonus magic damage (1.5 second cooldown). 3000 gold.
  • Morellonomicon item.png Morellonomicon: +80 ability power, +100% base mana regeneration, +20% cooldown reduction. Unique Passive: Dealing magic damage to an enemy champion below 40% health inflicts Grievous Wounds icon Grievous Wounds to them for 4 seconds. 2100 gold.
  • Nashor's Tooth item.png Nashor's Tooth: +80 ability power, +40% attack speed. Unique Passive: +20% cooldown reduction. Unique Passive: Basic attacks deal 15 + (15% AP) bonus magic damage on hit. 3000 gold.
  • Needlessly Large Rod item.png Needlessly Large Rod: +60 ability power. 1250 gold.
  • Perfect Hex Core item.png Perfect Hex Core: +60 ability power, +6 ability power per level, +500 mana. Unique Passive – Glorious Evolution: Viktor has reached the pinnacle of his power, upgrading Chaos Storm in addition to his basic spells. 3000 gold.
  • Rod of Ages item.png Rod of Ages: +60 ability power. Passive: Grants +20 health, +40 mana, and +4 ability power every minute / 40 seconds (maximum +40 ability power, +200 health, and +400 mana). +300 health, +400 mana. Unique Passive – Valor's Reward: Upon leveling up, restores 150 health and 200 mana over 8 seconds. 2700 gold.
  • Rylai's Crystal Scepter item.png Rylai's Crystal Scepter: +100 ability power, +400 health. Unique Passive: Dealing spell damage slows the target's movement speed by 20% to 40% for 1 second. 3000 gold.
  • Seeker's Armguard item.png Seeker's Armguard: +20 ability power, +30 armor. Unique Passive: Killing a unit grants 0.5 bonus armor and ability power. This bonus stacks up to 30 times. 1200 gold.
  • Seraph's Embrace item.png Seraph's Embrace: +80 ability power. Unique Passive – Insight: Grants (3% of your maximum mana) ability power. +1000 mana, +50% base mana regeneration. Unique Active – Mana Shield: Consumes 20% of current mana to shield yourself for 150 + (20% of current mana) for 3 seconds (120 second cooldown). 3000 gold.
  • Sheen item.png Sheen: +25 ability power, +200 mana. Unique Passive – Spellblade: After using and ability, the next basic attack deals 100% base AD bonus physical damage (1.5 second cooldown). 1200 gold.
  • Spellthief's Edge item.png Spellthief's Edge: +5 ability power, +25% base mana regeneration, +2 gold per 10 seconds. Unique Passive – Tribute: Spells and basic attacks against champions or buildings deal 10 additional damage and grant 5 gold. This can occur up to 3 times every 30 seconds. Killing a minion disables this passive for 12 seconds. You may only be in possession of 1 Gold Income item. 365 gold.
  • The Hex Core mk-1 item.png The Hex Core mk-1: +20 ability power, +4 ability power per level, +150 mana. Unique Passive – Progress: Viktor can upgrade one of his basic spells. 1000 gold.
  • The Hex Core mk-2 item.png The Hex Core mk-2: +40 ability power, +5 ability power per level, +300 mana. Unique Passive – Progress: Viktor can upgrade one of his basic spells. 2000 gold.
  • Trinity Force item.png Trinity Force: +30 ability power, +30 attack damage, +30% attack speed, +10% critical strike chance, +8% movement speed, +250 health, +200 mana. Unique Passive – Rage: Basic attacks grant 20 movement speed for 2 seconds on hit. Minion, monster, and champion kills grant 60 movement speed for 2 seconds. This movement speed bonus is halved for ranged champions. Unique Passive – Spellblade: After using an ability, the next basic attack deals 200% base AD bonus physical damage (1.5 second cooldown). 3703 gold.
  • Twin Shadows item.png Twin Shadows: +80 ability power, +10% cooldown reduction, +6% movement speed. Unique Active – Hunt: Summons up to 2 invulnerable ghosts that seek out the 2 nearest enemy champions for 6 seconds. If a ghost reaches its target, it reveals the tarhet and reduces their movement speed by 40% for 2.5 seconds. If a ghost cannot find a target, it tries to return to the caster. Ghosts that successfully return in this way reduce the item's cooldown by 20 / 40 seconds (60 / 120 second cooldown). 2400 gold.
  • Void Staff item.png Void Staff: +80 ability power. Unique Passive: Magic damage ignores 35% of the target's magic resist (applies before magic penetration). 2500 gold.
  • Will of the Ancients item.png Will of the Ancients: +80 ability power, +10% cooldown reduction. Unique Passive: Your abilites heal you for 15% of the damage dealt (calculated before your opponent's resistances) (33% effect for AoE). 2500 gold.

Variable Availability

  • STH Doran's Ring item.png Doran's Ring: +15 ability power, +60 health. Passive: +3 mana regen per 5 seconds. Passive: Restores 4 mana upon killing a unit. 400 gold.
  • STH Elixir of Sorcery item.png Elixir of Sorcery: +40 ability power, +15 bonus mana regen, Sorcery for 3 minutes. Sorcery: Damaging a champion or tower deals bonus 25 true damage. This effect has a 5 second cooldown versus champions but no cooldown versus towers. 400 gold.
  • S Mejai's Soulstealer item.png Mejai's Soulstealer: +20 ability power. Unique Passive: Grants +8 ability power per stack and 5 stacks upon first purchase. Grants 2 stacks for a kill or 1 stack for an assist (max 20 stacks). Half of the stacks are lost upon death. At 20 stacks, grants +15% cooldown reduction. 1400 gold.
  • C Prospector's Ring item.png Prospector's Ring: +35 ability power. Passive: +6 mana regen per 5 seconds. Unique Passive – Prospector: +150 health. 950 gold.
  • SH Rabadon's Deathcap item.png Rabadon's Deathcap: +100 ability power. Unique Passive: Increases ability power by 35%. 3500 gold.
  • S Magus item.png Runeglaive: +50 ability power, +200 mana, +10% cooldown reduction. Unique Passive – Spellblade: After using an ability, your next basic attack is converted to magic damage and deals 100% base AD (+ 30% AP) bonus magic damage in an area around the target. (1.5 second cooldown). Versus monsters, the empowered attack will also restore 8% of your missing mana. 1400 gold.
  • TC Wooglet's Witchcap item.png Wooglet's Witchcap: +100 ability power. Unique Passive: Increases ability power by 25%. +45 armor. Unique Active: Champion becomes invulnerable and untargetable for 2.5 seconds, but is unable to move, attack, cast spells, or use items during this time (90 second cooldown). 3500 gold.
  • SH Zhonya's Hourglass item.png Zhonya's Hourglass: +100 ability power, +50 armor. Unique Active – Stasis: Champion becomes invulnerable and untargetable for 2.5 seconds, but is unable to move, attack, cast spells, or use items during this time (90 second cooldown). 3000 gold.

Champion Abilities

Note: Only the ability power buffs of these abilities are shown here. To read more information on each of these abilities, follow the links to their champions' pages.

  • CassiopeiaSquare.png Cassiopeia's Aspect of the Serpent.png Aspect of the Serpent gives 5 / 10 / 30% additional ability power to Cassiopeia.
  • GalioSquare.png Galio's Runic Skin.png Runic Skin adds 50% of his total magic resistance to his ability power.
  • SingedSquare.png Singed's Insanity Potion.png Insanity Potion grants him 35 / 50 / 80 ability power for 25 seconds.
  • TaricSquare.png Taric's Radiance.png Radiance grants himself 30 / 50 / 70 ability power, and grants nearby allies half of that amount.
  • ThreshSquare.png Thresh's Damnation.png Damnation passively generates souls for him to collect, with each soul collected permanently granting 0.75 ability power.
  • VeigarSquare.png Veigar's Baleful Strike.png Baleful Strike permanently grants him 1 ability power when the ability kills a unit and passively grants him 1 / 2 / 3 / 4 / 5 ability power when he kills a champion from any damage source.
  • VladimirSquare.png Vladimir's Crimson Pact.png Crimson Pact grants ability power equal to 2.5% of his bonus health.

Masteries

  • Mental Force mastery s4.png Mental Force increases your champion's ability power by 0.33 / 0.61 / 0.89 per champion level (up to 5.94 / 10.98 / 16.02 at level 18).
  • Arcane Mastery mastery s4.png Arcane Mastery increases your champion's ability power by 6.
  • Archmage mastery s4.png Archmage increases your champion's ability power by 2 / 3.5 / 5%.
  • Arcane Blade mastery s4.png Arcane Blade causes your champion's basic attacks to deal bonus magic damage equal to 5% of your ability power.

Neutral buffs

  • The Hand of Baron.png Hand of Baron buff grants up to +40 ability power (among other bonuses) for 3 minutes.

Runes

Name Type Tier 1 (Lesser) Tier 2 (Normal) Tier 3 (Greater)
Ability Power Mark

GMarks (2)

X X 0.59

410 IP

Seal

GSeals (3)

X X 0.59

410 IP

Glyph

GGlyphs (3)

0.66

5 IP

0.92

35 IP

1.19

410 IP

Quintessence

GQuintessences (3)

2.75

15 IP

3.85

100 IP

4.95

1025 IP

Ability Power, Scaling

(Ability Power per level)

Mark

GMarks (4)

X X 0.1 per level (1.8)

410 IP

Seal

GSeals (2)

X X 0.1 per level (1.8)

410 IP

Glyph

GGlyphs (4)

X X 0.17 per level (3.06)

410 IP

Quintessence

GQuintessences (4)

X X 0.43 per level (7.74)

1025 IP

Trivia

This combination will result in CassiopeiaSquare.png Cassiopeia having 1612.8794976 ability power.
Relevant mathematics:
CassiopeiaSquare.png Cassiopeia's ability power = (16.02 + 6 + 1.8 × 9 + 1.8 × 9 + 3.06 × 9 + 7.74 × 3 + 40 + 180 + 133.98 + 4 × 120 + 40 + 35) × (2 − 0.95 × 0.88 × 0.7 × 0.7) = 1612.8794976
This combination will result in GalioSquare.png Galio having 127.5471288 ability power.
Relevant mathematics:
BraumSquare.png Braum's bonus magic resist = (5 + 10 + 0.77 × 9 + 0.74 × 9 + 1.34 × 9 + 4 × 9 + 25) × 1.05 = 106.7325
GalioSquare.png Galio's magic resist = ((5 + 30 + (15 + 106.7325 × 0.1) + 10 + 10) × 1.05) + 32.1 = 116.806912
GalioSquare.png Galio's ability power = (0.89 + 6 + 0.59 × 9 + 0.59 × 9 + 1.19 × 9 + 4.95 × 3 + 20 + (116.806912 × 0.5)) × 1.05 = 127.5471288

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