Board Thread:General Discussion/@comment-24589671-20141026162403/@comment-24674051-20141103151114

Besides, we also know that Kristoff and David were connected, and I highly doubt that an Ice delivery person has the magic to transport between realms, or the means to purchase such travel.

Also, there may have been more involved with Glinda that may never be explained. We saw Zelena *POOF* Glinda somewhere, and we know that the only ACCESS to Glinda is from the EF. It is possible that the door itself is the portal, enchanted with a specific kind of magic that Glinda set up to prevent Zelena from finding her (Only the pure of heart can go through the door doesn't sound like something Zelena would do, but perfectly in line for Glinda). The Ice area that Glinda is hiding could still be in OZ, for all we know. It was never stated where she was hiding.