User blog comment:FairyRaven/Fairy Tail Chapter 327: My Part Too, Review and Commentary/@comment-203.87.139.100-20130412131954/@comment-7418318-20130412133059

The term "Key to change the world" is already fulfilled. After all Hisui was only able to open the gate because she used all 12 Zodiac keys to unlock it first and thus the world is already changed.

Right now they are trying desperately to limit the amount of change that's happening (i.e. the number of Dragons that came through the gate).

What I'm wondering about is what the Dragons were doing. Except for that one blast that tore out of the caste and into the town, the Humans seem to be only affected by the Dragons rushing past. They aren't deliberately attacking.

So are those Dragons that came through really hostile towards mankind?