This seems like a cute, but cheap and powerful anti-griselbrand oath card in some respects. If an opponent can't remove this, they won't play their oath. If they do play it, you get first swing resulting in a griselbrand incoming. This is no good vs emrakul or sun titan as it is already attacking by the time this transforms. Really narrow, but if griselbrand becomes the defacto oath target again, this is a tool in the box to keep in mind. I think it just sucks everywhere else.