Fairy Tail - Darkness Revived

Seven years have passed since Natsu and his friends were caught up in Erza's tragic past as they rescued her from the Tower of Heaven. All is well at the Fairy Tail guild, but disturbing rumours soon arise, and strange job requests are coming in - many of which involve missing children, raids on villages and groups of masked individuals that appeared to specialise in black magic. Connecting the dots, Erza begins to form her own horrid theories of what this could all mean; suspicions that are confirmed when a few old friends from her past return. Can Fairy Tail prevent the new R-System from being built? More importantly, who is behind it all?

A/N: Very slight AU, many many tragic events and possible pairings. Set post-Tenroujima arc. I do not own Fairy Tail, if I did then there would be little purple haired JeRza babies everywhere... What.