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 god kill or assist a coin is flipped. If heads, you gain 150 Health over 6 seconds. If tails, you gain 5% Movement Speed for 6 seconds. You also gain 15 gold every time the coin is flipped.