Evil Genius

I don't think anybody could use it in a proper way, even if it was just 50-100 lbs (22.5-45 kg for people from countries with non-retarded units). Because you know... weight is not important. What's far more important is the length and the distance to the swords center of mass. This is wrong, Guts'...

Metallic structure is not ideal compare to structure which has many bonds and knots in it.
Carbon fiber is an example, but stronger material may be required to compare with a real dragon-slaying sword.