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 - Your abilities heal you for 10% of the damage dealt to targets.
AURA - Enemies within 55 units have their Attack Speed reduced by 25%.
PASSIVE - Hitting an enemy with a Basic Attack grants Haste for 1s, causing you to be immune from Basic Attack Movement Penalty.