First of all, she needs the proper setting for this. The sky is red like blood from the sunset, and it takes place on the water's edge where the surface reflects the light like fire. She faces fierce opponents on a Very Important Mission. Like a million of them. In her personal imagination they tend to be suits of black, spiky armor all about 3 times her size.

They will fight for like, a week minimum and the sky is red the whole time obviously. This is where she furies and reaches berserker enlightenment where all is combat forever and her soul is devoured by the forces that be because she is a fighting machine. She is able to defeat the enemies all a million of them by herself, crawls out of the wreckage with a bunch of new and conveniently awesome placed scars, and no longer is there Virelai.

There is only fight.

However, it's become more important to her to become a compassionate berserker and someone who manages to find the balance between all of the fight and nurturing others, which probably requires a soul.

If Siegmund stayed an assassin and had to preach some kind of new assassin order using the abilities in less morally questionable ways, how would he redefine and apply them?