I think it must be. [It was a source of endless frustration for Elizabeth. She didn't understand why the Queen of Hearts or whoever else was responsible for curtailing her power hadn't just taken it away from her altogether. It would surely be less of a risk for them.] I can still open tears here, but only big enough to look through, to bring things through. It requires more energy than I have to make one large enough or stable enough to physically go through.