Blue pulsing thingy

[Jetpack Jones]

I just started and im playing as the dwarf with robots, every second there is a blue pulsing thing on my character, i cannot figure out what it is, or how to stop it, or at least know what its doing. Thank you for anyone who can guide me.

[Desphex]

Might be an aura or hero trait.

[Bannedfromthediablo3]

https://tlidb.com/en/Charge_Calling