Oh, believe me I'm well aware it's not a realistically practical weapon in the slightest (I actually did quite a bit of research on axe heads while designing it). I was actually going to go for a more realistic design like you showed me there, but I went with a more stylized, fantastical look because I was initially inspired by Skyrim and other fantasy games. If you're interested, I have a few concept sketches on my Tumblr here featuring the axe and its initial concept.