User blog comment:Razhel/What is Your Favorite Guild Besides FT?/@comment-89.242.91.230-20130627173337/@comment-5840892-20130628054246

It's quite simple, the Eclipse Gate links to locations in Time and Space: The present and the past (around 400 years before the story starts). If have followed the entire series; you would know that around 400 years ago, there was a Dragon Civil War. In this Civil War the Dragon Slayers first appear on one side of the conflict as an ally to the Dragons of that side. The Dragons taught some humans their magic so that they (the humans) could assist them.

So, if the Eclipse Gate links the Present to the past before the Dragon Civil War occurred, there would be no Dragon Slayers on that side of the Gate to come to the present.