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).

Ability power has a theoretical gold value of 21.75 per unit. This means that 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

• Template:Ile
• Template:Ile
• Template:Ile
• 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 ability power.
• Singed's Insanity Potion grants him 35 / 50 / 80 ability power for 25 seconds.
• Thresh's Damnation passively generates souls for him to collect, with each soul collected permanently granting 0.75 ability power.
• Veigar's 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 Crimson Pact grants ability power equal to 4% of his bonus health.

Masteries

•  Natural Talent grants a total of 3 / 6 / 9 / 12 / 15 ability power and 2 / 4 / 6 / 8 / 10 attack damage at level 18.

Neutral buffs

• The Dragon Slayer buff grants +8 / 16 / 24% ability power.
• The 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	X	X	0.59 410 Influence Point
	Seal	X	X	0.59 410 Influence Point
	Glyph	0.66 N/A	0.92 1 Influence Point	1.19 410 Influence Point
	Quintessence	2.75 N/A	3.85 1 Influence Point	4.95 512 Influence Point
Ability Power, Scaling (Ability Power per level)	Mark	X	X	0.1 per level (1.8) 410 Influence Point
	Seal	X	X	0.1 per level (1.8) 410 Influence Point
	Glyph	X	X	0.17 per level (3.06) 410 Influence Point
	Quintessence	X	X	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 (+ 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 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, Illaoi, Kalista, Kindred, Olaf, Riven, Talon, Vayne, and Zed have no abilities or innate effects that scale with ability power.

(Last updated May 26th 2016 on patch 6.10)

Aside from Veigar and Thresh, who may obtain theoretically infinite ability power due to their respective passive effects, and Galio, interacting with 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 thanks to his passive, Runic Skin.

To reach this amount there are 5 nearby enemy players and 3 allied players needed, who play Braum, Orianna and Janna.

Galio must:

• Be level 18 while having a full rune page of Template:Rune runes.
• Have maximum ranks in the  Natural Talent, in the  Unyielding and in the  Legendary Guardian mastery.
• Possess the Hand of Baron buff (after 35 minutes) and three Infernal stacks of the Dragon Slayer buff, empowered by the buff of the Template:Moi.
• Have the Crest of the Ancient Golem buff.
• Have a fully stacked Mejai's Soulstealer, 4 Rabadon's Deathcaps, and one Seraph's Embrace.
• Have consumed an Elixir of Sorcery and have cast Bulwark on himself.
• Be a Conduit for Zeke's Harbinger at 100 charges (connected to Orianna)
• Be affected by Braum's Stand Behind Me and by Orianna's Command: Protect.
• Be affected by Legion, the passive of Locket of the Iron Solari and Banner of Command.

Janna must:

• Be level 18 while having maximum ranks in the  Windspeaker's Blessing mastery.
• Use her Eye of the Storm on Braum.

Orianna must:

• Be next to Galio, have Zeke's Harbinger and Locket of the Iron Solari or Banner of Command.
• Have maximum ranks in the  Windspeaker's Blessing mastery.
• Use level 5 Command: Protect on Galio.
• Be a Conduit for Zeke's Harbinger at 100 charges (connected to Galio).

Braum must:

• Be next to Galio and use his level 5 Stand Behind Me on him, while being shielded by Janna.
• Be level 18 while having a full rune page of Template:Rune runes.
• Have maximum ranks in the  Unyielding and in the  Legendary Guardian mastery.
• Have 6 Banshee's Veils.
• Be affected by Legion, the passive of Locket of the Iron Solari and Banner of Command.

This combination will result in Galio having about 2343 ability power.

Relevant mathematics:

Galio's ability power = (15 + 83.16 +  40 + 145 + 120 × 4 + 151.04 + 50 + 173.45) × (1 + 0.36 + 0.35 + 0.15 + 0.2) = 2343.44

• Braum's additional magic resistance = (70 × 6 + 15 + 15 + 11 + 73.44) × 1.05 = 561.16

• Magic resistance by Braum's Stand Behind Me = 25 + 561.16 × 0.16 = 114.79

• Ability Power gained by Runic Skin = (54,6 + 30 + 90 + 11 + 15 + 15 + 114.79 × 1.05) ÷ 2 = 173.45

• Full rune page of Template:Rune runes = (1.8 × 9) + (1.8 × 9) + (3.06 × 9) + (7.74 × 3) = 83.16

• Full rune page of Template:Rune runes = (1.26 × 9) + (1.8 × 9) + (2.88 × 9) + (6.66 × 3) = 73.44

• Seraph's Embrace's ability power = ((1000 +  200 + 1168) × 0.03) + 80 = 151.04

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

• The highest attainable ability power by a playable champion at level 1 (without disconnecting) is 129.2032153 on Galio thanks to his passive, Runic Skin. To reach this amount, he must:
  • Have maximum ranks in the Mental Force, Arcane Mastery, Archmage, and  Resistance masteries.
  • Have 3 last points in Enchanted Armor.
  • Have a full rune page of Template:Rune runes.
  • Have bought a Amplifying Tome.
  • Use Galio's Bulwark.
  • Be under the effect of Braum's Stand Behind Me with five enemies nearby.
  • Be under the effects of Mordekaiser's Creeping Death and Orianna's Command: Protect.

This combination will result in Galio having 129.2032153 ability power.

Relevant mathematics:

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 magic resist = ((5 + 30 + (15 + 117.315 × 0.1) + 10 + 10) × 1.075) + 32.1 = 119.9613625

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

Champion statistics