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 Physical Power equal to 2% of your Maximum Mana.
PASSIVE - Critical Strike bonus damage dealt is increased by 25%.
PASSIVE - Your first ability cast gains 20% Physical Penetration. This can only occur once every 5 seconds.