Timeskip to dawn of the next morning
Seth (POV)
I get up the next morning and get ready for the day but a certain smell has been bothering. I go out to the balcony and sniff the air. I hear Erza approach me from behind.
Erza- What are you doing up this early?
I don't reply and continue sniffing the air.
Erza- What is it? What do you smell?
Seth- I smell another dragon slayer and it ain't Natsu. Its coming from the park with the big tree. Get the others. I'll see you there. Come on Mandy.
Mandy- Ok.
I leap over the railing and dash to the park.
Timeskip
Erza (POV)
I grab the others like Seth said and went to the park. When I got there, there was a big crowd surrounding the tree.
Erza- We're from the guild please let us through. We get the front and see team shadow gear pinned to the tree

Lucy- Levy!
Grey- Jet, Droy!
Seth is also there and visibly shaking. I get closer to him and I see his face.
Author: His expression is this one

Natsu- Phantom lord did this.
Master Makarov comes forward.
Erza- Master.
Makarov- I can take our headquarters being reduced to rubble, (both his and Seth's magic pressures begin to rise) but I will not let my children come to harm with taking revenge! (Breaks cane)

Makarov- We have no choice but to go to war!
Seth's energy explodes and darkness fills the sky. A red energy glow surrounds him and he turns to us. His eyes are straight red.

Seth- Normally........I'm merciful......but this time around.........I'm going to phantom lord to kill and I don't care if I have to blow up Fiore to do so. I will show them......what pure darkness is!!!
Timeskip
Seth (POV)
The whole guild minus Lucy travel to oak town where the phantom lord guild hall is situated.

Erza- Please don't kill anyone Seth.
Seth- ..........No promises. I'm already pissed off.
We make it the guild hall and I stretch my hand outward. Death God Slayer magic erupts from my hand and I blast a big ass hole through the building.
Seth- (sadistic) Knock knock.
Makarov- Fairy Tail has come calling!!
War cries erupt and we engage the enemies.
Seth- Death God: Darkest Void!!!
A giant energy ball forms on my hand and I blast at the enemy guild.

It takes out 75 percent of them. Makarov grows big and takes out some more people.
Enemy wizard- He's a monster.
Makarov- And you dared to lay a finger on this monster's children! Were you foolish enough to believe human laws would protect you from my rage?!
Seth- I'll show you all darkness!!! Death God: Shadow Beam!!!
Author: Basically this.

Phantom lord guild- He's a demon!
Makarov- Jose! Show yourself!
Seth- Smell another Dragon Slayer! Show yourself bitch!
Makarov- Seth, Erza! I leave the rabble to you.
ES- Yes sir!
I go on about my business punching everyone in my sight with my death Slayer magic. Suddenly a person jumps down from above and lands on a table in front of me.

Seth- You smell of a dragon slayer. You must be one.
???- You smell just like one too. And from what I've seen, you're a God Slayer as well. This is gonna be interesting. I'm Black Steel Gajeel. The iron dragon slayer. Prepare yourself.
Seth- Normally I would relish a fight like this but this isn't gonna be a fight.......It's gonna be a massacre.
He turns his arm into an iron pole and he extends it at me. I catch it with ease.
Gajeel- What?!
I yank him towards me and I punch him in the face with a death god charged punch. It sends him flying and he smashes into phantom lord's bar.
Seth- Allow me to introduce myself. I'm one of fairy tail's dragon slayers, it's only god slayer, and your demise, Seth Alighieri.
Gajeel- Hmph. Iron dragon: Club!
Seth- That sane move.
I meet it head on and I take to the gut.
Erza- Seth!
Seth- It's ok Erza. I wanted to see how this felt and to be honest, not impressed. I grab Gajeel's club and destroy it with my fist. Gajeel dashes at me and connects with a punch to my face. I retaliate with a bicycle knee to his jaw and punch to his gut which sent him back through a wall.
Seth- Death God: Darkness Wave!!
A wave of red energy erupted from my hands and it went in Gajeel's direction. I walk over to the rubble and grab him by his throat and lift him up.
Seth: Time to fly.
With great force, I throw him up into the rafters. He goes through a couple wooden beams before hooking himself to one. I use my magic to propel myself up to a beam across from him.
Gajeel- You are strong. But you won't man handle me again.
Seth- Is that so...
I charge up my energy and make the building and ground shake. Suddenly master Makarov comes down between us and smashes into the ground below.
Seth- Master!
I leap down to where he is. I kneel down and see his face is green

Seth- Come on Master. You're gonna be ok.
The enemy guild gets a morale boost and they start attacking us and pushing us back.
Seth- I'll make them pay!!! You'll all die!!!!!
My eyes go red and the place shakes more violently now.
Erza- We must retreat! Everyone back to the guild at once!
Grey- No way!
Erza- We don't stand a chance against Jose! Retreat! That is an order!
My enhanced hearing picked up Gajeel saying something about how they captured Lucy.
Seth- You guys got Lucy?!
Natsu- What?!
Seth- Now you're really gonna die!!!
Erza (POV)
The weather outside turned very violent.
Erza- Seth come on! We have to go!
A red magic symbol appears underneath him

Seth (inhuman voice)- Death God.....
I quickly rushes over to him and grab a pressure point in his neck which knocks him out.
Erza- I'm sorry. Please forgive me Seth.
I grab knocked out Seth and the Master and I bolt it out of there back to the guild.
Author: Note to self, don't piss off Seth. Hopefully you guys enjoyed the chapter and I'll see y'all in the next one. Piece.