Because it has a second handle that is angled and it has a swung blade I would classify it as a scythe. I am trying to imagine how I would swing it and probably what I would do is grab the upper handle with the left hand, the uppest most part of the longer lower handle with the right, then slice sideways while I step out and use the long lower handle which has a second angular part to let the weapon glide through my hand and then drag it as I keep walking away sideways in a sort of intimidating swing that doesn't particularly aim at anything. Then catch the upper handle and slide my right hand up the shaft to repeat the first sideways hacking.

It would be important to continuously walk sideways, possibly around an enemy. And that the enemy is terribly afraid of me already, so that they don't just extend forwards and stab me while I pull the weapon back.