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 - While below 60% Health you become Berserk for 5s. While Berserk, you gain 5% Damage Mitigation and 20% Attack Speed. This effect can only occur once every 15 seconds.
PASSIVE - When you take Magical Damage from Abilities your cooldowns are reduced by 3s. This can only occur once every 30s.