Board Thread:Episodic and Issue Discussion/@comment-47881-20130227210719/@comment-3285234-20130227233911

In Before the Dawn, they have NO idea who are what works against Black Beetle, in True colors they found out that energy beams(Arsenal's laser) works agains Black Beetle.

So by the time of Blue's betrayal they already have an idea of what works and what does not, it's just that they did not manage to utilize them, because Arsenal took that chance away.