I have a concept for this beserker chick in my head that weilds two large, sort of oversized butcher's knives that are connected to each other by chain, meaning she can juggle them a bit like nunckucks or something.

On top of that she would also be somewhat demonic or skilled in some witchcraft and thus has poisonous blood. Drawing the blood onto the edge of the blade will give it a poison effect that will start to numb the senses of whatever it infects, and if she starts loosing blood she will enter an enraged state and will increase in power.

Maybe I could use it in an arena like battle, but just never found quite the RP for her to be used in.