(Flashback)

Y/n is seen by the river near the bridge at Magnolia. He sat there for a moment when Erza came over behind him and ask him.

Erza: You wanted to talk to me?

Y/n: Yes. There is something I must tell you in case something bad would to happen.

Erza: Okay, what is it?

Y/n: (Stood up and turn to Erza) I do have many magic but there is one that is dangerous to use. This magic can turn me into a God of Darkness. It makes me extremely powerful and unstoppable but....continue using it will result to me losing control.

Erza: Sounds dangerous.

Y/n: My master taught me this magic ability. He wanted me to be as powerful as possible, no matter the odds. After I betrayed the guild I promise myself to never rely on this forbidden magic too much.

Erza: Why telling me this?

Y/n: Cause I feel like it will be wrong that only I and Makarov know this spell. Since you know my past I feel like in order to gain your trust, that I must warn you about my forbidden magic.

Erza: I appreciate you telling me this Y/n.

Y/n: Thank you Erza. I can't promise it cause either I may use I when the situation calls for it....or it may activate without warning.

(Present day)

Y/n launches himself towards Gajeel and clashes his blade against Gajeel's iron arm. The two enter a lock until Gajeels swings his leg at him but he leaps backwards then lands on his feet.

Then Natsu rushes in and throws a iron fist at Gajeel in the face. Gajeel then grab his arm and then slammed him onto the ground.

Gajeel goes for a blow only to be hit by Y/n's kunai's which gets Gajeel's attention. He charges towards him while Y/n pulls out two bladed daggers then quickly slash at him.

Gajeel groans a little as Y/n begins to land quick slashes around Gajeel but his body is hard to cut due to being an iron dragon slayer however it does annoy him.

Gajeel: (angry) Your starting to piss me off!

He then slammed his fist onto the ground and iron pillars is shot out which Y/n quickly avoids only for Gajeel to launch towards him but Y/n leaps over him.

Then Gajeel turns and then grab him then slammed him onto the ground. Lucy begins to worry as Gajeel was about to stomp on him.

Y/n sinks into the floor just as Gajeel slammed his foot onto the ground.

Gajeel: Where do you think you go!

Natsu: Hey jerk!

Then Natsu charge at him and then strike a fist at his face. Lucy and Happy watch the two dragon slayer battle them Y/n appears next to them.

Happy: You good Y/n?

Y/n: I'm okay. Gajeel is a challenge unlike the last time I fought him.

Lucy: Wait let me help! Maybe I can-

She reach her celestial keys only to realise they were not with her. However she pulled out one which is Sagittarius.

Lucy: I only have Sagittarius. Guess he has to do!

Y/n: Then do it.

She then use Sagittarius key and he is summoned buy rather as hald man, half horse he is just a human spirit wearing a horse costume.

Sagittarius: I'm ready madam!

Y/n: (surprised) I was suspecting for him to be half human, half horse.

Happy: What's with the horse custom!

Then Natsu gets beaten down by Gajeel and shown to be weaker and weaker which gets Gajeel the upper hand.

Happy: Natsu is beaten down badly! He needs fire!

Lucy: Sagittarius can you shoot fire?

Sagittarius: (Salute) No I onky shoot archery.

Lucy: Great.

Happy: Who is is saluting to?

Gajeel turns his arm into a blade and goes to strike at him but Y/n appeared and block his attack. The two begin to clash blades until they enter a blade lock.

Y/n: It's over! The element four is defeated and both weapons is no more! You've lost!

Gajeel: (smirk) Please there are other ways to destroy your guild.

Then Gajeel charges up his iron dragon roar. Thinking quickly he throws Natsu away then moves himself as Gajeel unleashes his attack which he missed and cost a hole to break open.

Y/n slide across the floor and stood with a hole behind him. He stare at Gajeel while he stare back then smirked.

Gajeel: (smirk) Hey look, we are doing some remodeling to your guild.

He turn and sees in shock of all the shade troopers forming into a bigger shade creature and focus fully on the guild. Natsu, Happy and Lucy also watch and soon the guild then collapsed.

Gajeel laughs while Y/n and the rest watch this with disbelief and shock. Then Y/n grind his teeth and immediately appear in front of Gajeel and clash his blade on Gajeel's arm.

Y/n: (angry) How dare you destroy our guild!

Gajeel: (smirk) Looks like someone is angry.

Y/n then let's out a yell and swings his blade at at him. Gajeel stumble backwards and to his surprise sees a cut on his arm.

Y/n stood there with blade in hand as he reflect everything that has happen. The guild Hall being trashed, Makarov critical injured, Laxus uncaring cruelty, the tears of many and facing the victims of his past.

Soon his body begins to give off a black aura around him. Natsu, Happy, Lucy and Gajeel felt a sudden fear and chill.

Then Y/n begins to walk towards Gajeel which Gajeel fires his iron dragon roar at him but his attack didn't do anything which shocks everyone.

Gajeel: (shocked) How can this be possible?!

Then Gajeel rushes towards him and goes to strike at him when suddenly he was struck by a invisible force and the strike sent him flying and crash him into the wall.

Then Gajeel burst out of the hole and charge towards him until a invisible force to struck him once again and he crashed onto the ceiling.

Bits of the ceiling falls apart then Gajeel drops down and slammed onto the ground. Gajeel tries to get up but when he looks into Y/n's eyes he immediately felt like his mind is attacked and he collapses onto the floor.

Y/n stood over him just as Gajeel lays on the floor and looks up at him. Y/n stare at him coldly with blade in hand as the two stare at each other until a hand grab Y/n's shoulder which was Natsu.

Natsu: Yo I think you done it. You good?

Then Y/n shake his head and the dark aura fates away. Y/n looks at the defeated Gajeel then to Natsu, Happy and Lucy.

Y/n: Yeah I'm okay. Sorry about that. I think I'm stressed out from everything that is going on.

Natsu: Yeah I think we all are.

Y/n nodes then he turn to Lucy ans approaches her.

Y/n: Are you okay?

Lucy: Yeah I'm okay. Thanks for coming to save me.

She then hugged him which he hugged her back just as a large light appeared which nearly blinded all of them.

Y/n: What is that light?

Natsu then smirks then says.

Natsu: (smirk) Looks like gramps is back.

Y/n is relieved that Makarov has recovered. He turn to Lucy as she smiled at him while the two holds hands.

Happy: (smirk) They are in love!

Lucy: Don't ruin this moment!

(A few hours later)

We find Y/n within a tent with someone who is working with the Magic Council as they arrive after Fairy Tail won the battle as Y/n tells the person the full details.

Y/n: That's how the battle is won. As you can tell we didn't started the war, it was Phantom who started it.

???: And yet you sneak into the Phantom Lords guild.

Y/n: I feel like there is more to the plan. I not think it would've make sense Phantom to do all of it just to mess with us.

???: I see. And what about Lucy?

Y/n: She is okay and no one blame her for the Chaos that has happened. As for me....I would never blame my guild member no matter what.

She then smiled then tells Y/n.

???: Well I think we have everything we need. Judging by everyone and the citizens of both Magnolia and Oak town, it is clear that the Phantom Lords started it all. An act like this is punishable by the guild have to be disbanded. As for Fairy Tail....Well that's for the council to decide.

Y/n: Thank you so much.

???: (smile) Hey the Magic Court may see you guys as annoying but to me, you guys are pretty cool. You can say I am a fan of your guilds ideals.

Y/n: (smile) I appreciate your compliment miss....?

Olivia: (smile) Call me Olivia. Hey, if you or your guild have any problems, talk to me and I can sort things out.

Y/n: (smile) I appreciate everything Olivia. Thank you so much.

Olivia: (smile) No problem.

The two shake hands and after that we find Makarov sat underneath a tree near Magnolia when Y/n came up to him.

Y/n: Master Makarov. How are you?

Makarov: Fine although Porlyusica warn me if I do anything like that again she'll refuse to help.

Y/n: Guess she isn't a fan of your thing huh?

Makarov: No she is not.

Y/n: Master.....I came here because I-

Makarov: I know why you came here and you have no reason to apologise. In fact I'm proud of you.

Y/n: Why?

Makarov: Because you were the only one to see through the Phantom Lords game while all of us was blinded in anger. And when I was down you were the only rely everyone together and fight. Even before then you save three members of your fello guild.

Y/n: Yes. Although I have done those things....however one thing that troubles me is my forbidden magic. I accidentally use it and could have done something far worse if not for Natsu.

Makarov: Trying to control darkness isn't easy. But as long you have friends by yourself, you'll do whatever you can to master your darkness so you can be a better person.

Y/n: (bow) I will train hard so I can master my abilities.

Makarov: (smirk) No need for training. At least not now. Get some rest, you earned it.

Y/n: (smile) As you wish, master.

Then he left to rest while Makarov enjoys the veiw for the moment then he let's out a heavy sigh.

Makarov: (thought) Good thing the Magic council didn't seriously punish me for the chaos that has happen between us and Phantom. Hopes nothing like this will never happen again. Oh who am I kidding, it may happen again. (Sigh with disappointment)

To be continued........................................