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.
Heal for 200 after activating Soul Harvest.
Increase your maximum Health by 750.
Reduce your damage taken by 6% for 3s after activating Ignition.
Heal for 150 for each champion hit by Juggernaut.
Increase your Ultimate charge rate by 60%.