Originally Posted by Radinax
But remember the passive of Maramune. "Your single target spells and attacks consume 3% of your current mana to deal twice the amount as magic damage".
Don't know if i'm not interpreting good the sentence but i think it says that it doubles your magic damage at the cost of 3% of your mana. Please correct me if i'm wrong.
You are wrong.
What muramana does is drain your mana for extra dmg on the target.
Let's say your Q deals 100 damage and you have 1000 mana.
Your Q will now deals 100 + ( 3% of 1000 mana * 2 = 60 ). Your Q will deal 160 dmg.
And that only procs with single target spells and attakcs. Means only Ezreal's Q, E and auto-attacks proc this, his W and R don't benefit.