Natsu after Avatar! Gray to kill Frosch!? – Fairy Tail 425
Fairy Tail 425 reveals a mystery to what Future Rogue told Natsu of who killed Frosch, which is supposedly Gray. We see Natsu stop current Rogue and Minerva in their job to destroy Avatar as Natsu quickly takes over and heads towards Avatar in an effort to find Gray and bring him back to Fairy Tail.