User blog comment:Miskos3/Fairy Tail 514: Dragon Seed, Review/@comment-30338537-20161213161220/@comment-9595671-20161215130716

Exactly, I think the problem is they need to find the "source" of their magic's original power in a sense. That's what'll help complete it. Considering Dragons are extinct now, that may be hard. Then again, maybe the fact Irene is here may give a solution to that problem.

Though since Laxus is pretty hurt right now, I don't think he'll be able to move to get that kinda power up unless it's something like Porlyusica studying a part of a scale Irene loses in a fight with Erza that tells her how to boost him and Cobra.