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 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.

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

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.
 * adds to his ability power.
 * grants him ability power for 25 seconds.
 * passively generates souls for him to collect, with each soul collected permanently granting ability 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.
 * grants ability power equal to.

Masteries

 * grants a total of and  at level 18.

Neutral buffs

 * The buff grants.
 * The buff grants up to  (among other bonuses) for 3 minutes.

Trivia
(Last updated May 26th 2016 on patch 6.10)
 * The ability with the largest is, with a maximum AP ratio of  counting initial cast of  and the target taking damage from all 45 ticks of tibbers aura damage ( per tick).
 * The second and third bounces of scale exponentially, however the low base ratio means it will not beat other spells at normal levels of AP.
 * ,, , , , , , , , , and have no abilities or innate effects that scale with ability power.

Aside from and, who may obtain theoretically infinite ability power due to their respective passive effects, and , interacting with  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  thanks to his passive,.
 * To reach this amount there are 5 nearby enemy players and 3 allied players needed, who play, and.
 * must:
 * Be level 18 while having a full rune page of runes.
 * Have maximum ranks in the, in the and in the  mastery.
 * Possess the buff (after 35 minutes) and three Infernal stacks of the  buff, empowered by the buff of the.
 * Have the  buff.
 * Have a fully stacked, 4 s, and one.
 * Have consumed an and have cast  on himself.
 * Be a Conduit for at 100 charges (connected to )
 * Be affected by  and by.
 * Be affected by Legion, the passive of and.
 * must:
 * Be level 18 while having maximum ranks in the mastery.
 * Use her on.
 * must:
 * Be next to, have and  or.
 * Have maximum ranks in the mastery.
 * Use level 5 on Galio.
 * Be a Conduit for at 100 charges (connected to ).
 * must:
 * Be next to and use his level 5  on him, while being shielded by.
 * Be level 18 while having a full rune page of runes.
 * Have maximum ranks in the and in the  mastery.
 * Have 6 s.
 * Be affected by Legion, the passive of and.


 * This combination will result in having about 2343.


 * Relevant mathematics:


 * ability power


 * additional magic resistance


 * Magic resistance by


 * Ability Power gained by 2


 * Full rune page of  runes


 * Full rune page of  runes



[Last updated 13/8/2015 on patch 5.15]
 * The highest attainable ability power by a playable champion at level 1 (without disconnecting) is  on thanks to his passive, . To reach this amount, he must:
 * Have maximum ranks in the, , , and  masteries.
 * Have 3 last points in.
 * Have a full rune page of runes.
 * Have bought a.
 * Use.
 * Be under the effect of with five enemies nearby.
 * Be under the effects of and.


 * This combination will result in having .


 * Relevant mathematics:


 * bonus magic resist
 * magic resist(())
 * ability power()

Ability power Fähigkeitsstärke Poder de habilidad Puissance Moc umiejętności Сила умений 法术强度