Base attack speed determines the frequency of unit basic attacks and the effectiveness of bonus attack speed, which grants increased attack speed proportional to base attack speed; base AS benefits more from 20% bonus attack speed than base AS. Bonus attack speed stacks additively before applying to base AS, meaning two separate sources of 40% bonus attack speed grant a total of 80% bonus AS. Under the list you can see one additional champion: Mini Gnar, the default form of Gnar who has different base stats.