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 damage you take by 4% for 3s after activating Tendril.
Reduce the cooldown of Tendril by 0.6s.
Increase your maximum Health by 150.
Reduce the damage you take by 10% for 5s after hitting an enemy with Dark Siphon.
Reduce the Cooldown of Dark Siphon by 5s if it fails to hit a target.