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 - On damaging an enemy god, once per ability, gain 2 Magical Pen for 10s, stacks up to 3 times.
PASSIVE - Restore 1% of your Maximum Mana upon damaging an enemy god with an ability, once per god.
PASSIVE - While below 60% Health, you gain an additional 15% Physical Lifesteal for 5 seconds. Can only occur once every 15 seconds.