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 15.
Reduce your damage taken by 12% for 3s after activating Ignition.
Reduce the Cooldown of Ignition by 0.6s.
Reduce your damage taken by 20% for 3s after activating Soul Harvest.
Increase your maximum Health by 750.
Increase your Ultimate charge rate by 60%.