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.
Consuming Darkness stacks Heals you for an additional 40 per stack.
Reduce the Cooldown of Dark Siphon by 1s if it fails to hit a target.
Reduce the cooldown of Tendril by 0.6s.
Increase your maximum Health by 200.
Increase the Healing received from Dark Siphon by 250 health.