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.
Increase the Healing received from Dark Siphon by 200 health.
Heal for 180 for each enemy hit with Obliteration.
Reduce the cooldown of Tendril by 2.4s.
Increase your maximum Health by 150.
Reduce the Cooldown of Tendril by 0.6s after hitting an enemy with Dark Siphon.