So I am planning on cosplaying Fuu from Magic Knight Rayearth but I'm not sure how to go about her monstrous long sword. If it was normal sized I think I would have been fine but the sword is taller than she is so I am worried about stability issues. I'm planning on making the sword around 6' tall and the grip out of PVC. I'm not sure what to make the actual blade out of that wouldn't be too heavy but strong enough to take a hits and bumps. I was thinking foam board but the sword is pretty flat and I really don't want to add bulk by running a dowel down the center. Also tips on how to go about the hilt would be great too. I was thinking maybe carving the basic shape out of green Styrofoam and working from there.