Okay so here's the Arc!!

[center][b]DREAMS OVER REALITY ARC[/b]
One day, everyone is doing their normal business, going on quests and coming back from quests. 

Or just sitting around drinking at the bar. 

They all go to bed at the end of the day, of course. But when they (the Mages still in town) wake up, they find themselves in a new world, where everything is perfect for them. They're having so much fun in their dreams, they don't wake up. And that's when the Dark Guild behind this invades the town, where all the Mages are asleep. They rob all of the powerful artifacts and burn down many of the buildings, and still the Mages in their sleep don't wake. They can't until they start to hate their dream world, which isn't any time soon, for their dreams are so perfect. Though, the longer they sleep, the more of their Magic is drained and channeled to the Dark Guild, where their Magic is used to do the illegal. 

Fairy Tail Mages returning from quests get a huge shock from seeing this and there are two options: to save their friends first, before they are completely drained of Magic, or to pursuit the Dark Guild and get back their artifacts. 

Neither of them is an easy feat. [/center]