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.
Heal for 300 after activating Soul Harvest.
Increase your maximum Health by 450.
Generate 75 Ammo after activating Ignition.
Heal for 450 for each champion hit by Juggernaut.
Each Soul Fragment gathered Heals you for 45.
Increase your Ultimate charge rate by 60%.