Talk:Havoc (Season 2014 Mastery)/@comment-26371683-20150505092106/@comment-26186030-20150603133859

It increases the damage you do, indirectly increasing your ap, but it doesn't change the numbers there. It changes the numbers when you're dealing with calculating the damage. Post-calculation it adds 3% of the effective damage to the spell/auto attack.

Example- Let's say you use a spell with a base damage of 100 that gets 100 more damage from your ap. That's a total of 200 damage. You have 0 magic penetration. You use it on an enemy with 100 magic resist. That spell would normally do 100 damage to that enemy, but if you take this mastery it gives 3% more damage. 3% of 100 is an extra 3 damage every time you use that spell on an enemy with 100 magic resist. It doesn't directly affect your ap or ad.