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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: +60 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. 2700 gold.
  • Ardent Censer item.png Ardent Censer: +40 ability power, +100% mana regeneration, +10% cooldown reduction. Unique Passive: +8% movement speed. Unique Passive: Your heals and shields on another unit grant them 25% attack speed 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, +50% base mana regeneration, +20% cooldown reduction. Unique Passive: Restores 15% 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 (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. 1485 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 (60 second cooldown) (700 range). 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, +500 mana, +60 armor, +10% cooldown reduction. 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: +50 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. 2900 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 to them for 4 seconds. 2100 gold.
  • Nashor's Tooth item.png Nashor's Tooth: +60 ability power, +50% attack speed. Unique Passive: +20% cooldown reduction. Unique Passive: Basic attacks deal 15 + (15% AP) bonus magic damage on hit. 2920 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, +20 mana, and +2 ability power every minute / 40 seconds (maximum +20 ability power, +200 health, and +200 mana). +450 health, +450 mana. Unique Passive – Valor's Reward: Upon leveling up, restores 150 health and 200 mana over 8 seconds. 2800 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 35% (15% for multi-target spells, damage-over-time spells and spells with a cooldown time below 3 seconds) for 1.5 seconds. 2900 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: +60 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). 2700 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. nique 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: +70 ability power. Unique Passive: Magic damage ignores 35% of the target's magic resist (applies before magic penetration). 2295 gold.
  • Will of the Ancients item.png Will of the Ancients: +80 ability power, +10% cooldown reduction. Unique Passive: +20% spell vamp. 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 Magus item.png Magus: +80 ability power, +20% cooldown reduction. 1400 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.
  • SH Needlessly Large Rod item.png Needlessly Large Rod: +80 ability power. 1600 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: +120 ability power. Unique Passive: Increases ability power by 30%. 3300 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). 3540 gold.
  • SH Zhonya's Hourglass item.png Zhonya's Hourglass: +120 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). 3300 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.

  • 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 him 1 ability power per 40 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 (6 / 11 / 16 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% per rank.
  • 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 Marks (2) 0.33

30 IP

0.46

165 IP

0.59

410 IP

Seal Seals (3) 0.33

30 IP

0.46

165 IP

0.59

410 IP

Glyph GGlyphs (3) 0.66

30 IP

0.92

165 IP

1.19

410 IP

Quintessence Quintessences (3) 2.75

80 IP

3.85

410 IP

4.95

1025 IP

Ability Power, Scaling

(Ability power per level)

Mark Marks (4) 0.06 per level (1.08)

30 IP

0.08 per level (1.44)

165 IP

0.1 per level (1.8)

410 IP

Seal Seals (2) 0.06 per level (1.08)

30 IP

0.08 per level (1.44)

165 IP

0.1 per level (1.8)

410 IP

Glyph GGlyphs (4) 0.1 per level (1.8)

30 IP

0.13 per level (2.34)

165 IP

0.17 per level (3.06)

410 IP

Quintessence Quintessences (4) 0.24 per level (4.32)

80 IP

0.34 per level (6.12)

410 IP

0.43 per level (7.74)

1025 IP

Trivia

This combination will result in CassiopeiaSquare.png Cassiopeia having 2018.22584309 ability power.
Relevant mathematics:
CassiopeiaSquare.png Cassiopeia's ability power = (16.02 + 6 + 83.16 + 40 + 180 + 135.3102 + (4 × 120) + 40 + 35) × (1.05 × 1.12 × 1.3 × 1.3) = 2018.22584309
This combination will result in GalioSquare.png Galio having 126.157979062 ability power.
Relevant mathematics:
BraumSquare.png Braum's bonus magic resist = (5 + 10 + 37.65 + 25) × 1.05 = 81.5325
GalioSquare.png Galio's magic resist = ((5 + 30 + (81.5325 × 0.1) + 15 + 10 + 10) × 1.05) + 32.1 = 114.1609125
GalioSquare.png Galio's ability power = (0.89 + 6 + 36.18 + 20 + (114.1609125 × 0.5)) × 1.05 = 126.157979062

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