So this all seems horrible. And that includes me. I know I said I was back to finish my stories, I know I chickened out of the challenge and went back on my word so I won't pretend any more. Natsu Deathbringer and The Fraternity will not be finished so I figured the least I can do is tell you how they were going to end.

This is the fraternity.

So the story as far goes that Fairy Tail have found a way to revive Natsu using the fragments of his soul he locked in all of them. With help from Zeref and Mavis they pull Natsu from his current other dimension which was actually his true form with which to manipulate the world around him.

Natsu returns but cannot stand to look at his old friends and instead leaves the island immediately. Instead watching guard from Hargeon as a first line of defence for when the Third comes. In this time Natsu comes to grips with the new power he can access from his home dimension which acts as a power source he can draw on for magic, but it cannot be used as dragon slayer magic.

While practicing with the 3 types of dragon slayer magic and the 3 types of god magic he is joined by a few members of fairy tail and the fraternity who set out after him. They inform him of their final plan to defend the island and defeat the third and Natsu informs them it won't work for various reasons. And proposed a counteroffer.

The plan to use the etherion will not kill the third however if the instead point it at Natsu he can consume it and use it to power his own magic beyond what his home dimension could and use that to fight the third. Which is exactly what will transpire. Natsu remains distant from everyone other than Mika because she simply won't let him leave her again.

The third arrives and the battle takes a lot of lives. Wendy, Gajeel, Mira, Makarov and a whole lot of other secondary characters are killed. The Third is eventually defeated but succeeds in killing Zeref as well.

With the balance now shifting because there is no second immortal, Natsu must take his place and channels all of his existing energy into Zeref and extracting the second immortals' power. With the ultimate curse of immortality now locked to Natsu he exacts the same aura of death around him.
Doing this created a problem of it's own meaning that The Third immortal was now empty to balance the First and Second Immortals power. Stepping up to this task is the only remaining one who can absorb the magic in the same way Natsu had done, and Mika steps forward and is chosen by the Third Dimension, which was now empty after Natsu left it.

Mika is accepted as the Third Immortal and the 3 of them begin resetting what they could. Returning oceans that the third had evaporated and trying to dull fires that were raging across the world.

It would take many many years but the world would be as it was before and humanity would continue. Natsu and Mika vanished, way to live their immortal lives with one another, but keeping a watchful eye over humanity and stepping in to prevent any further attempts at starting this war again.

The End