came to our world to find her before Regina cast the curse
This is a thing that was supposed to be impossible, though goodness knows the writers are flexible on that point.
As for the timeline, it might add up but it depends on how long we thought the Dragon was in our world. Long enough to business and to establish himself as a wise man. Lily was sent through the portal to our world less than nine months before the Curse. And it would take time for the Dragon to learn about Lily’s vanishing and to figure out where she went. So like I said, it adds up *if* we don’t think about it too hard.
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"He was a lot of things to me" "The only conclusion was love"