(Tenrou Island-Fairy Tail Basecamp-an hour later)
Natsu sat up after being punched by Makarov and scratched the back of his head "What do you need Master?" Makarov looked at him before looking at Harry "First things first, who is this young man?" Harry grinned "Hi, I'm Harry Solaris, and I have been living on Tenrou for several years now, I have watched your S-Class trials and I must say, Fairy Tail seems to be quite the impressive guild".
Makarov blinked "How has no one ever found you?" Harry chuckled before waving over himself "Invisibilitatem, et odor tacet" Harry disappeared from view, the slayers couldn't hear or smell him either, he then cancelled it all, he smiled "I can be invisible if I want to be". Makarov blinked "Well, young man, do you want to join Fairy Tail?" Harry tilted his head for a moment before sighing "Sure, I have been trying to think of a reason not to and I haven't been able to".
Makarov nodded before turning back to Natsu "Now, what were those flames about earlier?" Natsu summoned his chaotic hell flames "these are the flames of consumption, a mixture of the flames of hell and the flames of chaos, those two on their own are extremely powerful and can burn through magic itself but this can burn through anything" everyone stared at the unique flame in awe "You have to be born with this magic to use it though".
Gray blinked "So, are you the dragon king?" everyone looked at Gray for a second before turning to Natsu, Natsu sighed and looked at Wendy, Gajeel and Harry who all nodded, he then looked back at everyone else "Yes, I am". "EHHH" "I was fighting in the Dragon War 400 years ago, I was the dragon king" Carla spoke up "What is your relationship with Wendy?" everyone looked at Wendy then shivered due to the cold look on her face.
Natsu chuckled "Calm it Marvell" Wendy smiled at him "Wendy and Gajeel both were dragons under my command, they both served me and were some of my closest friends back in the dragon wars". Natsu turned to Harry "That magic you used earlier, that was death magic, you are much older than you seem aren't you?" Harry chuckled sheepishly "Aye, I have been living on Tenrou for 40 years before that I spent 7 years in a pocket dimension and before that, I spent nearly 400 years alive in another dimension before coming here, so I am about 447 years old".
Everyone stared at him in shock until Natsu began to chuckle "Fair enough, to be fair, you are only about teen years to a dragon, I myself am over 1000 years old" Harry grinned "Indeed, so old timer, how do I scale on the dragon power spectrum?" Natsu burst into laughter "Cheeky brat and to be fair Harry, you are actually at the level of a noble to king dragon at this point, so you are bloody powerful" Harry chuckled "Well, I am Death's current champion in this world and as I said earlier to Hades, she isn't happy".
Natsu looked at him curiously "So she is an actual being?" Harry nodded "Aye, she greeted me on the last day in my original dimension" Natsu nodded "That is kinda cool, what did you do to become her champion?". Harry shrugged "I accidentally became immortal" people were about to ask when the slayers all heard a roar, they all jumped to their feet and looked around, Erza spoke "What is it?".
Harry and the other slayers looked up "A dragon" everyone looked up to see a giant mass of black and blue, it was massive, it was at least 70 meters long and 35 meters wide, it had a wing span of 250 meters along, it was a massive black dragon. "Acnologia" everyone turned to Makarov "The Black Dragon of the Apocalypse, everyone, we need to run" Natsu nodded and the lot of them began to run for the ship.
Acnologia landed in front of them and roared causing the forest they were in to be destroyed, only leaving a barren wasteland instead, Gildarts stood "His is only playing with us" everyone turned as a massive power spike of magical energy flared from Harry, he stared at Acnologia in rage, Acnologia tilted his giant head, this one was powerful for an insect. Harry appeared above Acnologia's head "Solar Phoenix's Solar Flare Hammer".
Harry slammed his clamped hands onto Acnologia's head causing him to dip a bit, Harry looked at the mages "Are you going or not?" he looked back at Acnologia "And you, destroy my forest will you? I am going to beat you into fucking oblivion" he continued to smash into Acnologia with different attacks. Makarov threw off his shirt and began to grow, he grabbed Acnologia in a head lock and shouted at Harry "Go with the others, get to the ship, I'll hold him here".
The Fairy Tail mages began to argue as tick marks appeared on Makarov's face "DO YOU WISH TO DEFY YOUR MASTER'S LAST WISHES, NOW GET TO THE SHIP!" Laxus grabbed Natsu and Gildarts grabbed Harry as the group ran into the forest, Makarov watched them go 'Live my children, do not shed tears for this old man' he then growled at Acnologia "YOU WILL NOT HARM MY CHILDREN" he started to push the dark dragon back.
(Tenrou Island-Forest-X784)
Natsu and Harry broke free of the grips and glared at them "We" "Are" "Not" "Leaving" "Him" "Behind" they finished in unison, Erza spoke up "How do you expect to beat that dragon?" Natsu turned to Harry who nodded "We are Slayers, we are Fairy Tail, there is no enemy that we cannot beat, no obstacle we cannot overcome, now, who are we?" "Fairy Tail" "We can't hear you?" "FAIRY TAIL" Harry and Natsu nodded "Better, now let's go save our master" they group ran back the way they came from.
(Back with Makarov)
Makarov landed on the ground in pain as Acnologia leaned over him with a wide open maw, Makarov began to laugh 'At least I die with no regrets' he tilted his head to the side and closed his eyes, only to open them again when he heard running, he saw Natsu and Harry run past him and jump on the dragon "Natsu, Harry" "Not now Gramps" "We're a bit busy Master" Acnologia threw Makarov away, who shrank as he hit the wall, he looked up to see Laxus and Erza stood over him ready to fight.
"Erza, Laxus, you two as well" Laxus chuckled "I was ready to leave you behind but those two, those two just couldn't do it, they weren't raised that way, and neither was Fairy Tail, they weren't just gonna leave an old geezer like you behind" Makarov had tears in his eyes and a smile on his face "You damn brats". Natsu jumped at one of Acnologia's wings "Fire Dragon's Piercing Talon" he slammed his foot down on the wing causing two of the scales to be dislodged.
Harry quickly created a portal to his pocket dimension and had them fall into that, he then jumped on the other wing "Solar Phoenix's Piercing Feathers" he jumped into the air and shot off several sharp feather like fire shots which tore through several scales which then fell into the portal that Harry created. Wendy jumped up and aimed for Acnologia's knees "Sky Dragon's Air Cutters" several blades of wind ripped through several of the scales causing them to fall into the pocket dimension.
Gajeel jumped up "Iron Sand" tons of sand like metal fragments flew into the air above Acnologia and transformed into a giant guillotine which then fell onto Acnologia's wings causing giant cuts to run along them. The Fairy Tail mages all stood next to Laxus who began to emit massive amounts of lightning and magical power "Alright you guys, lets hit this over grown lizard with everything we've got, I don't want to hear excuses, if you all hit him with all of your magic and I smack his with 10,000,000 volts of lightning, he'll learn never to mess with Fairy Tail again".
The thunder legion stared in awe "Laxus" Wendy smiled "Be careful" Gajeel and Gray grinned, Natsu and Harry both looked at Laxus "Laxus?" "You two had best get out of the way cause here it comes" Harry jumped off Acnologia "Solar Phoenix's Phoenix Form" Harry was consumed by flames before emerging from them as a giant Phoenix, that was a quarter of the size of Acnologia, he quickly grabbed Natsu and flew away from Acnologia as the others attacked.
"Raging Bolt" "Heaven's Wheel" "Super Freezing Arrow" "Water Nebula" "Solid Script: Fire" "Gate of the Archer, Sagittarius: Hail of Arrows" "Evil Explosion" "Dark Ecriture: Pain" "Barrion Formation" "Fairy Machinegun" the attacks all combined into one before smashing into Acnologia casing a giant bubble of magic, Laxus growled as Acnologia didn't seem to care "This guy is just laughing at us, time to see what you Dragon Slayers can do".
A voice appeared in his head 'And you as well, Laxus, enter your dragon force' Laxus entered his dragon force before being picked up by Harry in his Phoenix form, he was brought up to the rest of them "Sky Dragon Roar" "Iron Dragon Roar" "Fire Dragon Roar" "Lightning Dragon Roar" the Phoenix form released a torrent of plasma which joined forces with the roars which all merged together "UNISON RAID" the attack hit Acnologia sending him flying backward roaring in anger, embarrassment and pain.
Everyone cheered as Acnologia disappeared below the waves the dragon slayers landed as did Harry as he reverted back to his human form, they all shook their heads "This isn't over, yes we managed to hurt him but he is more powerful than all of us and he will not underestimate us again". As Natsu said this Acnologia flew up from the waves and flew up into the sky, Mavis appeared in front of them all "First Master?" she looked at Makarov "Third, you have become old".
Makarov sweat dropped "What?" Mavis shook her head "No time, I need a few more minutes to be able to stop the next major attack but that means that there has to be someone willing to go and fight" everyone stared in shock. Makarov went to move only to have a strong grip on his shoulder, he turned to see Natsu staring at him "No Gramps, this is something we have to do" he, Wendy, Gajeel, Laxus and Harry was walked away from the group.
Erza rushed to stop them on for a giant wall of fire to appear, Mavis looked at them and nodded, she looked at Harry "Harry" Harry turned to her "yes Casper" everyone looked confused as Mavis giggled "You know the spell I am going to cast, you know the cost" Harry nodded "See you when you get back" she smiled and skipped over. She kissed him and his eyes widened before he returned it, they both pulled back "How?" she winked "I used a small amount of magic to become Psychical just for that, now go".
Natsu and the others shot off into the sky "There is five of us, two unison raid dragon slayer attacks and one Phoenix secret art should give us enough time" the others nodded as Natsu and Laxus breathed in "Roar of the Lightning Flame Dragon" the roar crashed into Acnologia stopping him from attacking for them moment, Gajeel and Wendy then attack "Roar of the Iron Sky Dragon" the second unison raid roar hit Acnologia causing him to stop again.
"Pesky Humans" Harry snorted "My turn" she enveloped himself in plasma "Phoenix Slayer Secret Art: Burning Plasma, Solar Flare Strike" his magic turned into the form of a Phoenix which in turn flew at Acnologia crashing into his chest. After the smoke dissipated everyone could see a giant burn mark and some melted scales on his chest "Damn bird, take this" Acnologia roared as he released a giant breath attack, hitting all of the dragon slayers causing them and their Exceeds to fall into the ocean, it then flew at the island where it met a golden shield before the island disappeared, Acnologia flew off in victory.