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 - Using an ability gives your next Basic Attack within the next 8 seconds +75% of your Magical Power as additional Magical Damage. The effect can only apply once every 2 seconds.
Using this item subtracts 3s from all abilities currently on Cooldown and restores 40% Health and Mana lost within the last 5s. Cooldown - 120s.