I'm not sure how I feel about this one. I feel like I broke the magic logic towards the end. If commanding the cloak to do something is so powerful that it will essentially kill itself, then how could it disobey her previous order, which it gave confirmation to.
Speaking of the ending, I think it might be too abrupt. That was the point of course, but maybe I could have had a sentence or two as more of a resolution. You can probably figure it out, and this way is more dramatic, so I'm going to keep it this way I think.