User blog comment:FairyRaven/Fairy Tail Chapter 301: The Dragon King, Review and Commentary/@comment-1460085-20120928150942

Ok, this caught me by surprise. Now we get to see the truth behind Dragon Slayers and Acnologia. Jesus....the King of Dragons, no less. We're against one big badass then.

Now Arcadios interests me. He smells of lies and lies, but something of what he said must have been true. I mean that Zeref turned Acnologia into a dragon can be true and his hypothesis that destroying Zeref will lead to the destruction of Acnologia makes a reasonable idea of why Zeref wants to die so badly. Why at Natsu's hand? It beats me at the moment.

Arcadios's intentions are still unclear. What Eclipse is and how it is related to the Festival is also unknown, but we managed to get at least some answers and why not, make sense of some stuff.