The Magic Council is having a meeting about the mysteriously-disappearing dark guilds when they're attacked by a powerful force, the harbinger of the Tartarus threat that will derail Fairy Tail's recent relative peace and quiet.
It's probably that, you know... the ones 
that call themselves an independent guild...
...إنّهم هم على الأغلب
...الذين ينعتون أنفسهم بالنقابة المستقلة