Attack speed (AS) is a stat that determines how quickly a unit can perform basic attacks, measured in attacks per second. Each champion has a base attack speed and can gain bonus attack speed from various sources.

Key Points:

• Base attack speed is fixed at level 1 value
• Bonus attack speed stacks additively
• Attack speed is capped at 2.5 attacks per second (0.4s per attack)
• Minimum attack speed is 0.2 (5s per attack)

Calculation Formula: Total AS = Base AS + (AS Ratio × Bonus AS%)

Where:

• Base AS: Champion's level 1 attack speed
• AS Ratio: Champion-specific multiplier
• Bonus AS%: Sum of all percentage bonuses

Sources of Bonus Attack Speed:

• Champion levels
• Items
• Abilities
• Runes
• Buffs

Special Cases:

• Some champions like Bel'Veth can exceed the 2.5 AS cap
• Certain champions (Jhin, Graves) have modified AS calculations
• Bonus AS can scale other abilities beyond just attack speed

Gold Value: 25 gold per 1% bonus attack speed

Attack Speed Cap Modifications:

• Bel'Veth: Cap increased to 9999.0
• Varus: Cap increased to 2.7632
• Zeri: Cap reduced to 1.5
• Sion: Cap modified to 1.75 during Glory in Death
• Jinx: Can exceed cap during Get Excited!

This stat is crucial for basic attack-focused champions and scales multiplicatively with other offensive stats like critical strike and on-hit effects.

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