[Video]
It is just that. A window--or a door, really, I've never quite understood why it's called a window more often--that I could travel to from one location to another. My skill at it isn't that great, but here it is all but impossible. I can imagine home, but there is no way to unlock the way that blocks me from it.
[Her abilities are not the strongest of those of her occupation, but she's even weaker here than she would expect.]