User blog comment:FairyRaven/Fairy Tail Chapter 357: The Nine Demon Gates, Review and Commentary/@comment-24097640-20131027000721/@comment-4829046-20131027081020

Maybe he was reincarnated. :/ Kind of like in Avatar where Sozin killed Roku but failed to stop the Avatar interference by capturing Aang. Just throwing in theories here. Or even a similar thing as what happened to Resha Valentine.