TERA Update Adds New Kelsaik Raid
Are you raid ready? TERAs latest update is. The latest addition of new content for TERA adds the new Kelsaiks raid with a 10 & 20-person version, both with their own achievements. Along with the raid, the update also adds solo- or duo queue options for Champions Skyring, removes the prologue tutorial, squashes several bugs, and more.
The update isn't huge but it does contain several bug fixes and some other adjustments to features as well. Check out the patch notes for the full list.
Source: TERA Patch Notes