The answer is that the team is preparing another exciting content update for the end of November called Fang and Feather. As with the previous patch, this one will be split between a class rework and additional content — namely, a 30-person raid dungeon (presumably starring the “fang” of the title).
The “feather” is in reference to the revamp of the Archer class. “TERA’s nimble strategist is getting a new set of strings, with new skills, new mechanics, and a whole new way to play!” the team said. With these changes, the Archer will be able to exploit enemies’ weaknesses, charge forward to close the gap in a fight, and be able to build focus to fire hard-hitting shots quicker than before.
Source: TERA