User blog comment:B214/Chapter 433 & 434 in a nutshell/@comment-11721917-20150511125956/@comment-1359322-20150511131121

Yeah Igneel's advice did become useful.

Magic Council, they're never there when you need them and will only be there after you have no use for them.

Well Mavis was the one who knew the spell back then while Erza's the one that knew it now.