User blog comment:FairyRaven/Fairy Tail Chapter 323: The Shadow That Comes And Goes, Review and Commentary/@comment-49.176.2.62-20130315141659/@comment-180.254.163.41-20130315144613

maybe because future rogue wants to let natsu co. feel despair upon seeing his appearance. then eliminate them, (obvious why would new characters kill quickly without even indroducting themselves, lol)

or because zeref's order to not kill them