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 - Protects you from a single hard Crowd Control effect once every 70 seconds. When this occurs, you gain 1s of Crowd Control immunity.
PASSIVE - While over 25% Mana, you gain +10% Cooldown Reduction. While under 25% Mana, you gain +50 MP5.
PASSIVE - For each enemy God within 55 units of you, you gain a stack of 4% Damage Mitigation. This caps at 3 stacks.