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.
Heal for 400 after hitting an enemy with Shoulder Bash.
Increase the duration of Siege Shield by 1.2s.
Gain 50% Lifesteal.
Increase your maximum Health by 150.
Increase your maximum Ammo by 5.