Board Thread:General Discussion/@comment-24942479-20170620091934/@comment-33446972-20171029145813

Pixie dust from pixie flowers can open portals to other words like when emma traveled to Neverland trough a portal (from the pixie dust) to her true love Hook, but pixie dust from the trees can't, because it's not powerfull enough.

I believe that there are many kinds of pixie dust and each of them with a special ability.