User blog comment:Phantombeast/Phantom's Ring of Hope - Fairy Tail 372/@comment-4728047-20140222224448

I could feel how excited you were through the text (a pain in the ass to do, normally)

anyways, since Zeref said that Tartaros is his bookshelf, I don't think it's a Time-Stopping spell, it may be more something like "And we'll stop reading here for a moment to talk to this character within the story"

if Tartaros really is Zeref's bookshelf, then maybe Zeref uses some really powerful (possibly OP) version of Book Magic?