User blog comment:Miskos3/Fairy Tail 514: Dragon Seed, Review/@comment-30338537-20161213161220/@comment-1776824-20161213225525

It can only be in Ishgar. If it was in Alvarez they would have had Aquarius' key and none of the others. Grammi had moved to Alvarez and that was the gigantic issue. The fact that the Heartfilia's had been watching the gate for generations, as well as the fact that there were human-loving dragons to begin with means they were in Ishgar. It's simple.