User blog comment:FallenShadow/Fallen's Reviews: Chapter 341-343/@comment-15382134-20130711221848/@comment-7418318-20130711223855

Considering that Raven Tail was the only dark guild that wasn't affiliated with the Baram Alliance and that Tartaros is the last remaining member of that alliance, it would be logical to assume that all remaining dark guilds are now subordinates of Tartaros.