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.
Each Soul Fragment gathered Heals you for 75.
Gain a 150-Health Shield for 3s after activating Juggernaut.
Increase your maximum Health by 450.
Heal for 150 for each champion hit by Juggernaut.
Heal for 500 after activating Soul Harvest.
Increase your Ultimate charge rate by 60%.