User blog comment:HQDominator/Who else thinks they should make 7 star units?/@comment-25516050-20141114090026/@comment-24277289-20141114152334

I was thinking it would probably be the same way that you get the other two BBs to get the MBBs. Although, since it takes to long to fill, it would only use as much BC as you needed for the previous BB in order to activate a BB or SBB before the MBB is filled up all the way. Otherwise, you would pick up 55/60 of the BC needed for the MBB and then lose it all on a BB that boosts some stats instead of just losing 20.

I think the last quest should be a special quest that gives you more cost and allows you to have a full team of the 6 Heroes that pits you against whoever the King of the Evil Gods is, who would be the toughest boss in the game and require 7 Stars to beat.

Also, there would be more trials added that would be harder for the 7 Star as well, of course.