User blog comment:HalointheSkye/Volume 3 Chapter 9 - PvP (IN WHICH A LOT OF SH*T IS HAPPENING)/@comment-1430834-20160118000753/@comment-27121579-20160119045617

I'd think there would be a lot more than just three. We just know the three confirmed - Blue 2, 3 and 4. There must be others somewhere else.