Attack Damage (AD) is the amount of damage dealt by a basic attacks excluding the applicable damage modifiers. Attack damage is the sum of two components: Base AD and Bonus AD. * Base AD is the portion of attack damage which originates from the champion itself. It is the sum of a constant base value that is individual for every champion plus a growth component which increases as the champion levels up. * Bonus AD is the portion of attack damage which originates from runes, masteries, abilities, auras and, most importantly, items.