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 8% for 3s after activating Tendril.
Gain a 75 Shield for 5s after activating Tendril.
Reduce the Cooldown of Dark Siphon and Obliteration by 2s after activating Tendril.
Reduce the cooldown of Tendril by 3s.
Heal for 120 for each enemy hit with Obliteration.