User blog comment:B214/Chapter 475 thoughts/@comment-4829046-20160229114938/@comment-4829046-20160229120607

I think it will be more serious than that. From what we gathered, Makarov's first container was emptied and his second origin was possibly blocked(if he even had access to it) so he pretty much lost all the magic he had PRIOR to getting attacked. In this case they are gaining extra magic into their containers when their bodies are possibly decades away from coping with said magic. If you take second origin as the equivalent to 7 years or less(coz that's pretty much blatant in this series) then we are talking several times that amount. That's like filling a simple torch battery with all the electricity produced from a nuclear reactor. That would likely scar you for life.

I wouldn't put it past Mashima in the name of happy ending reminiscent of RAVE, but hey, at least I laid down some logic XD