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.
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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).