This is our proprietary skill rating calculation. This has nothing to do with official game ranking or MMR.
The purpose is to show player skill levels relative to other players, not estimate MMR.
PASSIVE - You gain Magical Power equal to 7% of your Mana from items.
PASSIVE - Basic Attacks and Abilities gain 15% additional Magical Power against targets below 60% Health.
PASSIVE - Enemies hit by your abilities have 40% reduced healing for 5 seconds.
PASSIVE - Your first ability cast gains 20% Magical Penetration. This can only occur once every 10 seconds.