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 45.
Increase your maximum Health by 450.
Gain a 450-Health Shield for 3s after activating Juggernaut.
Heal for 450 for each champion hit by Juggernaut.
Heal for 300 after activating Soul Harvest.
Increase your Ultimate charge rate by 60%.