Ability power

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

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Items

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Variable Availability

Item availability needs updating. Template:Ile
Summoner's Rift, Howling Abyss Template:Ile
Summoner's Rift, Twisted Treeline, Howling Abyss Template:Ile
Summoner's Rift, Howling Abyss Template:Ile
Twisted Treeline Template:Ile
Summoner's Rift Template:Ile
Summoner's Rift, Howling Abyss Template:Ile
Item availability needs updating. Template:Ile
Summoner's Rift, Howling Abyss Template:Ile
Summoner's Rift, Twisted Treeline, Howling Abyss Template:Ile.
Item availability needs updating. Template:Ile
Summoner's Rift, Howling Abyss Template:Ile

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 Runic Skin adds 50% of his total magic resistance to his bonus ability power.
Singed's Insanity Potion grants him 35 / 50 / 65 ability power for 25 seconds.
Taric's Radiance grants himself 30 / 50 / 70 ability power, and grants nearby allies half of that amount.
Thresh's Damnation passively generates souls for him to collect, with each soul collected permanently granting 0.75 ability power.
Veigar's 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.
Viktor's Evolving Technology grants him 3 ability power per level.
Viktor's Augment: Death grants him 45 ability power.
Vladimir's Crimson Pact grants him 1 ability power per 40 bonus health.

Masteries

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 increases your champion's ability power by 6.
Archmage increases your champion's ability power by 2 / 3.5 / 5% per rank.
Arcane Blade causes your champion's basic attacks to deal bonus magic damage equal to 5% of your Ability Power.

Neutral buffs

The Exalted with Baron Nashor buff grants +40 ability power (among other bonuses) for 4 minutes.

Runes

Template:Rune and Template:Rune runes increase ability power.

Name	Type	Tier 1 (Lesser)	Tier 2 (Normal)	Tier 3 (Greater)
Ability Power	Mark	0.33 30 Influence Point	0.46 165 Influence Point	0.59 410 Influence Point
	Seal	0.33 30 Influence Point	0.46 165 Influence Point	0.59 410 Influence Point
	Glyph	0.66 30 Influence Point	0.92 165 Influence Point	1.19 410 Influence Point
	Quintessence	2.75 80 Influence Point	3.85 410 Influence Point	4.95 1025 Influence Point
Ability Power, Scaling (Ability power per level)	Mark	0.06 per level (1.08) 30 Influence Point	0.08 per level (1.44) 165 Influence Point	0.10 per level (1.80) 410 Influence Point
	Seal	0.06 per level (1.08) 30 Influence Point	0.08 per level (1.44) 165 Influence Point	0.10 per level (1.80) 410 Influence Point
	Glyph	0.10 per level (1.80) 30 Influence Point	0.13 per level (2.34) 165 Influence Point	0.17 per level (3.06) 410 Influence Point
	Quintessence	0.24 per level (4.32) 80 Influence Point	0.34 per level (6.12) 410 Influence Point	0.43 per level (7.74) 1025 Influence Point

Trivia

The ability with the largest AP ratio is Annie's Summon: Tibbers, with a maximum AP ratio of 9.8 counting initial cast and the target taking damage from all 45 ticks of tibbers aura damage.
The second and third bounces of Nami's Ebb and Flow scale exponentially, however the low base ratio means it will not beat other spells at normal levels of AP.
Darius, Draven, Garen, Olaf, Riven, Talon, Vayne, and Zed have no abilities or innate effects that scale with ability power.

Aside from Veigar and Thresh, who may obtain theoretically infinite ability power due to the passive effects of Baleful Strike and Damnation respectively, and Galio, whose Runic Skin interacts with a metagame mechanic not intended to be seen in gameplay (bonus magic resistance when disconnected), the highest attainable ability power by a playable champion is 1729.886... on Mordekaiser. To reach this amount, he must:
- have a fully stacked Mejai's Soulstealer and five Rabadon's Deathcaps.
- have a full page of Template:Rune runes.
- Maximum ranks in the Arcane Mastery, Mental Force, and Archmage masteries.
- possess the Exalted with Baron Nashor buff.
- have consumed an Elixir of Brilliance.
- be affected by the auras of nearby Taric's Radiance abilities
- have killed an enemy Kassadin with the same setup (except a Seraph's Embrace in place of one of the Rabadon's Deathcaps and maximum ranks in the Expanded Mind Mastery as well as maximum ranks in Arcane Mastery, Mental Force, and Archmage masteries.) with Children of the Grave
  - Note: Kassadin cannot have the Exalted with Baron Nashor buff, due to Mordekaiser's team capturing it.

This combination will result in

Mordekaiser having 1729.886... AP. The

Kassadin ghost spawned will have 2733.424... AP, though his abilities cannot be used.

Relevant mathematics:

Kassadin AP = ( + + + + + + + ) × ( × ) = 1335.782175

Mordekaiser AP = ( + + + + + + + + ) × ( × ) = 1729.8869338

Kassadin ghost AP = 1335.782175 + ( × ( × ) = 2733.424512

Galio is able to obtain the highest level 1 value of Ability Power in the game (without disconnecting) at more than 126.46725 AP. This is achieved by a combination of the following effects:
- Galio's Runic Skin
- Galio's Base MR 31.25
- Bulwark (30 MR)
- Braum's Stand Behind Me (15 MR or more)
- Mordekaiser's Creeping Death (10 MR)
- Orianna's Command: Protect (10 MR)
- Elixir of Brilliance (25 AP)
- Full ranks of Arcane Mastery, Mental Force, Archmage, Enchanted Armor, and Resistance masteries (6.89 AP + 5 MR)
- A rune page consisting of entirely flat-value Ability Power runes (36.18 AP)
- 31.25 base + 30 from bulwark + 15 from Braum + 10 from Mordekaiser + 10 from Orianna + 5 from Masteries (+ 0.05 x 70 Bonus MR) = 104.75 MR = 52.375 AP
- (36.18 + 6.89 + 25 + 52.375) x 1.05 = 126.46725

Champion statistics

Offensive	Ability power · Attack damage · Attack speed · Critical strike chance · Critical strike damage · Armor penetration · Magic penetration · Life steal · Omnivamp · Physical vamp · True damage
Defensive	Heal and shield power · Health · Health regeneration · Armor · Magic resistance · Tenacity · Slow resist
Utility	Ability haste · Energy · Energy regeneration · Mana · Mana regeneration Movement speed · Range
Other	Experience · Gold generation

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