Need help figuring out a attack cast at random

[Meta77]

Atm im playing my fighter class with my hu sitting sub atm. Sometimes when I am fighting a attack will go off that encases me in some sort of bladed aura. Only thing is i have no idea what or how im casting it at random?

[Zorua]

It's your mag doing that.

[Meta77]

Ah thank you. And thank you mag for doing random things i did not know you could do.