He wields a one handed spear.
But I must admit, that's what made me think about trying to forge something.
The choice of the fighting style was mostly because of Shaolin monks, though.
And I've always wanted to forge something, since I have all the needed equipment.
I figured out a spear/arrow head would be the best choice for a starter.
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Edit: When I think about it, they may have used wushu in Oberyn's fight scene.