AD
Attack Damage
Boosts auto-attacks and AD-scaling abilities.
When you need it
Core for ADCs, Fighters, Bruisers, AD Assassins.
Item examples
B.F. Sword, Infinity Edge, Bloodthirster.
Details & formulas
Foundation of every physical-damage build.
How to counter it
Stack Armor (Plated Steelcaps, Thornmail). Frozen Heart and Randuin's Omen cripple AA-reliant enemies.
Champions that build it
ADCs (Jinx, Caitlyn, Vayne, Ezreal, Tristana), AD fighters (Garen, Darius, Aatrox), AD assassins (Zed, Talon).