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 - Melee Basic Attacks decreases enemy Physical protections by 7, and increase your physical protection by 5 for 3s (max. 2 Stacks).
PASSIVE - Your first ability cast gains 20% Physical Penetration. This can only occur once every 5 seconds.
PASSIVE - Critical Strike bonus damage dealt is increased by 25%.