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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).

Ability power has a theoretical gold value of 21 21.75 per unit. This means that Needlessly Large Rod Needlessly Large Rod is the most efficient AP core item, with a gold/AP ratio of 20.833∞.The costs of these stats are always offset by increased final costs of their upgraded items.

Increasing Ability Power

Items

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Specific to Viktor Viktor

  • Prototype Hex Core Prototype Hex Core: Passive: Grants 1 − 18 (based on level) ability power and 10 − 180 (based on level) mana.
  • The Hex Core mk-1 The Hex Core mk-1: Passive: Grants 3 − 54 (based on level) ability power and 15 − 270 (based on level) mana.
  • The Hex Core mk-2 The Hex Core mk-2: Passive: Grants 6 − 108 (based on level) ability power and 20 − 360 (based on level) mana.
  • Perfect Hex Core Perfect Hex Core: Passive: Grants 10 − 180 (based on level) ability power and 25 − 450 (based on level) mana.

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.

  • Galio's Galio's Runic Skin Runic Skin adds 50% of his total magic resistance to his ability power.
  • Singed's Singed's Insanity Potion Insanity Potion grants him 35 / 50 / 80 ability power for 25 seconds.
  • Thresh's Thresh's Damnation Damnation passively generates souls for him to collect, with each soul collected permanently granting 0.75 ability power.
  • Veigar's Veigar's Phenomenal Evil Power Phenomenal Evil Power permanently grants him 1 ability power whenever he hits an enemy champion with an ability, and 5 ability power whenever he scores a champion takedown.
  • Vladimir's Vladimir's Crimson Pact Crimson Pact grants ability power equal to 4% of his bonus health.

Masteries

  • Natural Talent mastery 2016 Natural Talent: Grants 0.4 / 0.8 / 1.2 / 1.6 / 2 + (0.089 / 0.178 / 0.267 / 0.356 / 0.444 × level) attack damage (2 / 4 / 6 / 8 / 10 at level 18) and 0.6 / 1.2 / 1.8 / 2.4 / 3 + (0.133 / 0.267 / 0.4 / 0.533 / 0.667 × level) ability power (3 / 6 / 9 / 12 / 15 at level 18).

Neutral buffs

  • The Dragon Slayer Dragon Slayer buff grants +8 / 16 / 24% ability power.
  • The Hand of Baron Hand of Baron buff grants up to +40 ability power (among other bonuses) for 3 minutes.

Runes

Type Tier 3 % of Highest Price
Ability Power
AP mark 3 Mark 0.59 36% 410 IP Influence Point
AP seal 3 Seal 0.59 36% 410 IP Influence Point
AP glyph 3 Glyph 1.19 72% 410 IP Influence Point
AP quint 3 Quintessence 4.95 100% 512 IP Influence Point
Scaling Ability Power
Scaling AP mark 3 Mark 0.1 per level
(1.8)
59% 410 IP Influence Point
Scaling AP seal 3 Seal 0.1 per level
(1.8)
59% 410 IP Influence Point
Scaling AP glyph 3 Glyph 0.17 per level
(3.06)
100% 410 IP Influence Point
Scaling AP quint 3 Quintessence 0.43 per level
(7.74)
84% 1025 IP Influence Point

Trivia

  • The ability with the largest AP ratio is Annie's Annie's Summon: Tibbers Summon: Tibbers, with a maximum AP ratio of (+ 515% AP) counting initial cast of (+ 65% AP) and the target taking damage from all 45 ticks of tibbers aura damage ((+ 10% AP) per tick).
  • The second and third bounces of Nami's Nami's Ebb and Flow Ebb and Flow scale exponentially, however the low base ratio means it will not beat other spells at normal levels of AP.
  • Camille Camille, Darius Darius, Draven Draven, Garen Garen, Kled Kled, Illaoi Illaoi, Kalista Kalista, Kindred Kindred, Olaf Olaf, Riven Riven, Talon Talon, Vayne Vayne, and Zed Zed have no abilities or innate effects that scale with ability power.

(Last updated January 2nd, 2017, patch 6.24)

Aside from Veigar Veigar and Thresh Thresh, who may obtain theoretically infinite ability power due to their respective passive effects, and Galio Galio, interacting with Runic Skin Runic Skin and a metagame mechanic not intended to be seen in gameplay (bonus magic resistance when disconnected), the highest attainable ability power by a playable champion on Summoner's Rift is still on Galio Galio thanks to his passive, Runic Skin Runic Skin.

To reach this amount there are 5 nearby enemy players and 3 allied players needed, who play Braum Braum, Orianna Orianna and Janna Janna.
Galio Galio must:
Janna Janna must:
Orianna Orianna must:
Braum Braum must:
This combination will result in Galio Galio having about 2249 ability power.
Relevant mathematics:
  • Braum's Braum's base magic resistance at level 18 = 53.4
  • Braum's Braum's bonus magic resistance without counting Unyielding mastery 2016 Unyielding and Fearless Fearless
    = 70 × 6 + 8 + 3 × 5 + 11 + 73.44 = 527.44
    • Full rune page of Template:Rune runes
      = Scaling MR mark 3 1.26 × 9 +Scaling MR seal 3 1.8 × 9 + Scaling MR glyph 3 2.88 × 9 + Scaling MR quint 3 6.66 × 3 = 73.44
  • Flat magic resistance from Fearless Fearless = 36
  • Applying the formula (see Recursion)
  Resultant magic resistance = [a(1 + y) + b(1 + x)(1 + y) + c(1 + x)] / (1 - xy)
  • Braum's Braum's total magic resistance
    = (53.4 × 1.1 + 527.44 × 1.05 × 1.1 + 36 × 1.05) / (1 - 0.05 × 0.1) = 709.27959799
    • Braum's Braum's bonus magic resistance = 709.27959799 − 53.4 = 655.87959799


  • Galio's Galio's base magic resistance at level 18 = 53.4
  • Galio's Galio's bonus magic resistance without counting Unyielding mastery 2016 Unyielding and Fearless Fearless
    = 90 + 30 + 11 + 8 + 15 + 129.94073568 = 283.94073568
  • Flat magic resistance from Fearless Fearless = 36
  • Applying the formula (see Recursion)
  Resultant magic resistance = [a(1 + y) + b(1 + x)(1 + y) + c(1 + x)] / (1 - xy)
  • Galio's Galio's total magic resistance
    = (53.4 × 1.1 + 283.94073568 × 1.05 × 1.1 + 36 × 1.05) / (1 - 0.05 × 0.1) = 426.62467307
    • Ability power from Runic Skin Runic Skin = 426.62467307 × 0.5 = 213.31233654


  • Galio's Galio's ability power = (15 + 83.16 + 40 + 145 + 120 × 4 + 151.04 + 50 + 213.31233654) × (1 + 0.36 + 0.35 + 0.2) = 2249.04856279
    • Full rune page of Template:Rune runes = Scaling AP mark 3 1.8 × 9 + Scaling AP seal 3 1.8 × 9 + Scaling AP glyph 3 3.06 × 9 + Scaling AP quint 3 7.74 × 3 = 83.16
    • Seraph's Embrace's Seraph's Embrace's ability power = (1000 + 200 + 1168) × 0.03 + 80 = 151.04



[Last updated 13/8/2015 on patch 5.15]

This combination will result in Galio Galio having 129.2032153 ability power.
Relevant mathematics:
Braum's Braum's bonus magic resist = (5 + 5 × 3 + 0.77 × 9 + 0.74 × 9 + 1.34 × 9 + 4 × 9 + 25) × 1.10 = 117.315
Galio's Galio's magic resist = ((5 + 30 + (15 + 117.315 × 0.1) + 10 + 10) × 1.075) + 32.1 = 119.9613625
Galio's Galio's ability power = (0.89 + 6 + 0.59 × 9 + 0.59 × 9 + 1.19 × 9 + 4.95 × 3 + 20 + (119.9613625 × 0.5)) × 1.05 = 129.2032153


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