Given the rumours around Khans of Tarkir having a lot of Walls in it, I'm betting on this card being reprinted very soon. Like the flavour text says, it's really good at killing big flyers (like Dragons) and it's really cheap for its power/toughness. It's too bad that this can't block smaller creatures, but I suppose that gives it a balancing factor. Otherwise, you'd get a massive flying blocker for cheap with no downside.
Pros: 5/6 flyer for 4
Cons: Defender, can't block small things