Natsu-
"Lisana, come here, I want to show you something," I said, holding my hand out to her. It had been about a month after we defeated Archologia and things had quieted down. I had gotten more time to spend with her and I thought I should take her somewhere we hadn't been to in years.
"Give me a moment Natsu," she said, as I dragged her.
"But look," I said, pointing to the hut we built as kids.
"I-it can't be, how?" she asked, looking at me.
"Apparently one of the older wizards in the guild used magic to make it so nature wouldn't affect it," I said.
"It's amazing, but um, who's in there?" she asked, looking inside.
I knelt down and saw a boy about 15 sleeping with an Exceed that was black with dark blue mixed in.
"I don't know, but he smells weird," I said, sniffing the air.
"What do you mean?" Lisana asked, looking at me.
"He almost smells like a devil and a dragon slayer. I can't even tell what kind of magic he uses, can you grab the cat, we're taking him to the guild," I decided.
"Alright," she said, grabbing the cat. I noticed that it had a cloak on and a small dagger. I lifted the boy and noticed that he was very malnourished. He also had tattoos all over his body.
We ran as fast as we could to the guild and I busted the doors down.
"GRAMPS! We need some help here!" I yelled.
"What is the matter? Oh, take him to the infirmary and the Exceed too," Master said, walking down from the second floor. I ran to it and placed him on a bed. "Malnourishment, low magic reserves, several cuts and bruises. This kid has survived a lot, it's amazing he's alive. Natsu, can you tell his magic from his scent?"
"No, it's almost like he's a Devil and Dragon slayer, but I can't pinpoint a certain type," I said.
"Well, that's surprising, normally you of all people could tell magic type," Erza said, walking in.
The kid then shot up and took a deep breath and looked around.
"You," he said, glaring at me. "Who are you? Why are you wearing his face?!" he yelled, jumping at me. "You can't trick me, I saw him die. Don't pretend to be Natsu you damn Devil!" he yelled.
"What are you talking about? I'm Natsu. How do you know me?"
"Don't lie to me. I saw your kind kill them all. Natsu, Wendy, Gajeel, Sting, Rouge, Laxus, Grey, even Erik . You killed them all. They all died and I had to watch and hide. While they were slaughtered. All of the Dragon and Devil slayers were killed so you could rule so don't use his face and try to trick me!" he screamed.
"I am Natsu, here's proof!" I shouted, lighting my and up. "Fire Dragon Iron Fist!" I yelled. He then ate my attack. "What? He's a fire slayer?"
"No, it's impossible. Only Natsu's fire tastes like this. Crap, don't tell me I was sent to another dimension. Tell me, did you defeat Zeref?"
"Yea, why?" I asked.
"Well, this is awkward then. Um, I'm Damion, and I'm the Last Slayer," he said.
"I think that you should lie down and tell us what you mean," Gramps said.
"Thanks, um, so I'm from a different timeline when Zeref wasn't defeated and Devils walked and people would join them and cause havoc. Guilds were disbanded because they were just bigger targets. I am known as the Last Slayer because when all the Dragon and Devil slayers stood together they all died and sent their power to the nearest person, me. I can use Ice, Fire, Lightning, Iron, Wind, Shadow, Light, and Poison Dragon and Devil Slayer magic. It's just that it takes it out of me to use more than two elements at a time. That's why I have all these markings on me. They are my power to not let it destroy me."
"What's the last thing you remember?" Lisana asked.
"I was fighting Devils and I released all my breath attacks at once while Noble was flying me around. Everything went blue and we were in a field and I saw a small hut so we took shelter there. How is he?" he asked.
"Well, unlike you he only had a few minor bruises," Gramps said.
"So, what now?" Erza asked.
"Well, I always wanted to be in a guild. Can I join?" Damion asked.
"Of course, we will have to figure something to tell the rest of the guild members though," Gramps added, thinking.
"Why not just say that he's from a different world, like Mystogan?" I asked.
"Wow Natsu, that was actually very intelligent of you," Gramps said.
"Hey! I can be smart!" I yelled.
"Ha, you really are just like the stories. Hot headed and won't take no for an answer," Damion said, laughing.
"Hey, wait. If you know what my flames taste like but don't know me, how?"
"Easy, when I got the powers I got a taste of all of the different energies. I actually learned from the dragons that resided in the first gen and lacrima of the second gen," he added.
"What about the Devil Slayer magic?" Lisana asked.
"Well, for ice I went to Lyon, but the rest I kinda figured out myself. I can use Ice Make magic but it is usually just for Devil Slayer magic."
"Dang, you are overpowered, we need to fight after you get better," I said.
"Alright, who are you and what have you done with Natsu?" Lisana teased.
"Hey, even I can tell he's far too injured to fight so he has to get better to fight me at full strength. That and you told Mira that if I start a fight in the infirmary to not give me fire to drink," I said.
"Aw, so you're doing this because of me?" she asked with the Strauss "innocent" smile.
"No, because I want to drink fire!" I yelled running to the bar. "Hey Mira, two glasses of fire," I said.
"Um, why?" she asked. "You normally only drink one, I don't think you should have two."
"Only one is for me, the other is for the kid I saved, he's a slayer too," I explained.
"Oh, alright then," she said. A few moments later two glasses were set in front of me.
"Thanks Mira," I said, taking them to the infirmary. "Taste this, one of the best flames you will ever have," I told Damion, handing him the glass.
"Thanks," he said, drinking it. "Wow, you weren't joking."
"Yeah, well they made it for me, and so I thought you would like it," I said, grinning.
"Well Natsu, I think we should go let him rest," Gramps said.
"Yeah," I said, following Gramps out of the room.
Damion-
So, I'm in a different version of Earthland. I can't help but feel like I left everyone to die. I was one of the only ways to beat the devils. There are still books, scrolls, and lacrima with Devil Slayer magic. I was just the last big threat to the devils.
"Ugh, where are we?" I heard a growly voice ask.
"Well, we are currently in Fairy Tail's Guild Hall. We aren't in our version of Earthland Noble," I said.
"What? Fairy Tail? The first guild destroyed?" Noble asked. "How are we in a different version of Earthland?"
"Easy, my magic was countered and we were sent here," I said.
"So, how is this place different?"
"Zeref was defeated."
"Wow, that definitely would change things. So, what's going to happen now?"
"I think we are going to join the guild," I said, sitting up.
"Ha, we always said we would join a guild. I never thought it would be the Fairy Tail," Noble said.
"Well, this is going to be fun."
AN-
So, this is an idea I had for a while, just didn't know how I wanted to do it. I love Fairy Tail and Damion is my character from a TTRPG my friends and I did in a Fairy Tail AU. Noble was my best friend's character and so he will be able to do more than Happy.