User blog comment:Omega natsu2/Chapter 354: Ephialtes, Predictions./@comment-8153438-20130927123807/@comment-10197002-20130927125635

Technically the council didn't bestow the title of Wizard Saint to Jellal because they knew he was evil, they gave it to 'Siegrain' who they thought was a good guy, hence they let him be part of the council. Remember how way back in the first chapters of the manga the council were pissed that Ultear and Siegrain had joined them because they were immature and Siegrain said something like 'Hey, it's because of our awesome power.' this awesome power allowed him the title of Wizard Saint. This sort of makes Jellal an absolute power-house because his other half was a Wizard Saint so when they reunited he had double the power of whatever rank Wizard Saint he was with the very powerful Heavenly Body Magic and Dark Magic at his disposal. He probably can't use Dark Magic anymore but he wasn't on Tenroujima so he's got 7 years of training over Fairy Tail along with Mystogan's staves (if he decides to use them which he probably won't) and the fact that he hasn't revealed anywhere near his true power (he fought with Jura and Natsu and didn't even use 'True' Heavenly Body Magic, I don't know if he could use it in the Tower of Heaven Arc but he probably would've beaten Natsu using it). So yeah I want to see Jellal's potentail, he could quite possibly be one of the most powerful mage in the whole manga :P