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.
Reduce the Cooldown of Dark Siphon by 0.8s after hitting at least one enemy with Obliteration.
Reduce the Cooldown of Dark Siphon by 5s if it fails to hit a target.
Reduce the damage you take by 10% for 3s after hitting an enemy with Dark Siphon.
Increase your maximum Health by 50.
Increase the Healing received from Dark Siphon by 200 health.