Casy Kovach wanted to build a replica of Nightmare’s Soul Edge blade from Soulcalibur. So grabbing some wood, paint and a glass eye, he went right ahead and did it.
It's the scale of the thing that's so impressive. A lot of this kind of props work tends to be small in scale, but this thing is bigger than, well, bigger than a lot of humans.
You can see pics of the blade in progress at Casy's Facebook page (via Fashionably Geek).