It increase your damage done based on the amount of mana you have left Pretty straightforward, but in what way is the damage buff decreased when your mana goes down. Is is for every 1% of your mana pool you lose you lose 1% of your damage buff? Is it you have the full buff to a certain % of mana like at 79% you lose 20% of your damage buff.
I want to know the correlation between the buff and your amount of mana left.