Talk:Gameplay:Achievement System/@comment-24.205.201.166-20150921232217/@comment-129.42.161.35-20150925191556

I did it by doing "Facing the Sealed God" in "Grand Gaia Crater". I chose that one because it has 13 battles plus the final battle is really 3 balltes in a row. I also equipped all 5 of my guys with Celgrad Gems. I have no idea how many BCs I got but it worked in one try.