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 - When you take Magical Damage from Abilities your cooldowns are reduced by 3s. This can only occur once every 30s.
PASSIVE - For 8 seconds after using an ability, your next basic attack will deal an additional 10% damage. The effect can only occur every 3 seconds.