User blog comment:SoulRise99/HISHE: How Fairy Tail Should Have Ended/@comment-7418318-20170725060042

I had this idea of Lucy taking the Star Dress idea further and fully fusing with a Spirit.

When that fails to get results on Acnologia, she then fuses with multiple Spirits at once. Loke protests vehemently, because it will have some bad aftereffects on her body, but gives in to the arument that everyone including Lucy will die if she doesn't do it.

Once she fused with all 12 Zodiacs at once (Yukino's Spirits volunteer with Yukino'd permission) she finally starts to hurt Acnologia's body, but he still overpowers her. Then the Celestial Spirit King joins the part and with the full see of Zodiacs + CSK, she manages to slay the Dragon.

With the body dead, the astrol body that the DS fight is severely weakened and they are now able to take it down with team-work, without any power exchange.

After the DS return and we have the nice reunion Lucy's body starts to become translucent and intangible. Either Natsu or Wendy tries to grab her, but falls through her (if you've seen the end of Final Fantadsy 10, pretty much that).

The reason is that from fusing with so many Spirits and chanelling so much raw Celestial Spirit Magic her body became like that of a Celestial Spirit and she can no longer live in the Human world and is drawn into the Celestial Spirit World like the Spirits.

Now here my ideas split into three directions.
 * 1) The remainder of the team (maybe augmented by Yukino and Angel) goes on an adventure to find a way to turn Lucy Human again and eventually succeeds. At the start of the epilogue chapter they'd depart the guild, then a skip of however long it takes and then the reunion.
 * 2) Pretty much a reverse RAVE Master with Lucy turning up a certain time later without anyone from Earthland doing anything and then explaining that Lucy, the CSK and the Spirits worked hard to reverse the changes to her body and it took so long because of the different time-flows.
 * 3) Lucy stays a Spirit. The CSK creates a new constellation in the sky and creates a key for Lucy. Lucy gives all her keys to Yukino, except for Plue's and her own. Those she gives to Natsu. Plue so he can learn to summon Spirits. And then she asks Yukino to teach Natsu Celestial Spirit Magic. We get a few frame to show how utterly Natsu sucks at CSM at first and how he improves over time and finally he manages to first properly summon Plue and later Lucy herself. Once he manages this, he and Lucy form a contract and from now on Lucy can also summon herself to Natsu's position like Loke did with her. And then they can go on adventures together with the team.

Personally number 3 is my favourite... if I ever get around to continue writing fanficts, I'm either going to use that for an ending of my existing one or write a seperate one.

Oh as for Irene, I'd have her drop the sword instead of stabbing herself and then when Acnologia jumps them, she should push Erza out of the way to protect her and die with a smile on her face because she was able to finally do something positive for her little girl... maybe even have her whisper that out aloud.