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.
Increase your maximum Health by 200.
Increase the area of effect of all your explosions by 10%.
Generate 1 ammo for every -200 explosive damage done.
Increase the explosion radius of Hail of Bombs' explosives by 40%.
Increase the explosion radius of Cluster Grenade's initial explosion by 6%.