Ogedei_the_Mad
Caffeinated Khagan
Hard to tell from that angle - is the center blade longer than the two outside, like the ones here or here? I ask because it might also be useful as a trishul (similar Indian weapon).
Slightly OT: I watched War of the Arrows last night - about Joseon resistance to the Qing. Awesomely realistic display of virtuosity with a bow, imho. I'd like to see similarly great work with other Korean weapons such as this one in a comparable historic / wuxia film.
It has a slight outward curve, like the one in the second picture. Korean shamans also typically carry a smaller version of something almost identical to the Indian trishul (probably a Buddhist influence) in rituals.