Ability power (AP) is a core offensive statistic in League of Legends that primarily enhances champion abilities and spells. Unlike attack damage, AP has no baseline effect and must be obtained through items, runes, abilities, or buffs.

Key Points About Ability Power:

• Starts at 0 for all champions and doesn't increase with levels
• Stacks additively (1:1 ratio)
• Has a gold value of 20 per point
• Primarily scales magic damage abilities but can affect any damage type
• Often enhances utility effects like slows and shields

Champions who utilize AP typically fall into two categories:

1. Pure ability casters (e.g., Syndra, Xerath, Swain)
2. Hybrid champions with AP-scaling auto-attacks (e.g., Kayle, Diana)

Notable Features:

• 21 champions have no AP ratios at all (including Aatrox, Darius, Garen)
• Highest possible AP achievable is 1851.2 on Singed
• Maximum level 1 AP with starting gold: 75.6

Sources of Ability Power:

1. Items

• Core items (Rabadon's Deathcap, Void Staff)
• Consumables (Elixir of Sorcery)
• Item passives

2. Runes

• Arcane Comet
• Dark Harvest
• Electrocute
• Various minor runes

3. Buffs

• Dragon souls
• Baron buff
• Champion-specific abilities

Notable AP-increasing abilities:

• Veigar's Phenomenal Evil Power
• Vladimir's Crimson Pact
• Mordekaiser's Realm of Death
• Singed's Insanity Potion

The statistic can be decreased by certain champion abilities, primarily Mordekaiser's Realm of Death.

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