What does the blue number next to the black fist mean?

[killerman3333]

Data gather: team power

I am trying to put a guid together on how team power is determined by pulling from the player base at large. I know that when i leveled up my team power when up by 3 points. I do not know if it was the level up or the mana mastery that caused it. Therefore i would like to ask those playing to do some testing and please report your findings back I will edit this post with the desired information. This data can also provide insight on the pvp algorithm as well on how it determines opponents.