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 first ability cast gains 20% Magical Penetration. This can only occur once every 10 seconds.
PASSIVE - Restore 1% of your Maximum Mana upon damaging an enemy god with an ability, once per god.
PASSIVE - For each enemy God within 55 units of you, you gain a stack of 4% Damage Mitigation. This caps at 3 stacks.