Damaging an enemy champion with an auto-attack increases your spell damage by 1%, stacking up to 3 times (max 3% damage increase)
What is defined as "spell damage" for this mastery?
- Does it refer to damage type (true physical magic) or any damage from abilities?
- If it refers to ability damage, does the ability have to be castable?
- What about item actives like hextech gunblade?
I would appreciate if the answers are not based on guesses but rather on testing.
(I have done some tests; for example Vayne's W isn't affected, neither is sunfire or Teemo E while Cutlass's active is affected. Unless someone comes up with a valid answer, I will be doing some more tests in the following days and post my findings.)