Board Thread:General Discussion/@comment-26346951-20150716173453/@comment-25926288-20150716175207

Emma was from a time that the time travel was capable.

The wand can replicate any spell that has ever been done. Since Rumple was Past Rumple he couldn't open the portal, but Emmawas from the future when zlena did cast it, so she was able to replicate it (with the addition of having magic.).