Many men before you have tried to slay me.
For centuries, I simply killed them, but death was too quick. Better to change them. It amused me to watch once proud men like you strain against the new forms I put you into!
Kings into pigs, Knights into mice, their squires into snakes to whom I would feed the mice. An annoying Bard is now an immortal cricket I keep in a cage. His music soothes me.
For you, the action hero of our age, muscle bound, and manly, a history of sexual conquests, and poorly justified violence, I have chosen a fitting shape.
A weak and fragile girl.
You will find that no matter how hard you train, you will never grow stronger. You will also soon feel the urge to have a man inside you. That body will cry out for it, even as you despise it.
Now, take your losses and flee, before I get creative!