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 - On leveling up, heal 15% of your Maximum Health and Mana over 3s.