I wish this had either haste or trample. If this connects, it'll hurt but it probably won't connect since it has no evasion. The other issue is that this won't kill anything when it's blocking. Yeah, it'll probably never be able to block because it's attacking, but it's still a slight negative (especially since it doesn't have haste). It's a cool idea, but I think it's a little weak.
Pros: Usually a big swing
Cons: No evasion, 0/4 outside of combat