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 Harpoon by 6s.
Increase your maximum Ammo by 4.
Generate 3 Ammo for each enemy hit by Harpoon.
Increase your maximum Health by 100.
Heal for 70 for each enemy hit with Harpoon.
Harpoon no longer has a Cooldown, but no longer Slows enemies hit.