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 +20% additional Movement Speed after leaving the Fountain. This effect lasts 7s.
PASSIVE - Enemies hit by your abilities have 40% reduced healing for 5 seconds.
PASSIVE - Your first ability cast gains 20% Magical Penetration. This can only occur once every 10 seconds.