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 300-Health Shield for 3s after activating Juggernaut.
Heal for 150 for each champion hit by Juggernaut.
Reduce your damage taken by 25% for 3s after activating Soul Harvest.
Heal for 200 after activating Soul Harvest.
All your living allies are Healed for 1.5% of their maximum Health for each Soul Harvested.