A/n: Might be shorter. As I am trying to finish this story as fast as Possible. Oh and Removing a Harem member, Gabby.

Previously

Y/n: NOW IT'S MY TURN!!!

He put some destructive energy into the Bomb and threw it on the Center of Atlas. And when the Bomb hits, It's Goodbye Atlas.

He went back down and joined the rest. However, He remembered something and talked to Vorzechs.

Y/n: Where's MoltenWood

Vorzechs: Let's just say. He's resting in Piece

He was confused and let it go. But what Vorzechs meant is that Ironwood was Picked off limb from limb by Vorzechs' Brutality.

And so. Pneuma came in all sad.

Pneuma: L-love?

Y/n: Yes?

Pneuma: I lost Eri. She's in the underworld.

Y/n, Vorzechs, Rose, And Iri smiled sadistically.

The Four: Their going down, Down down DOWN! D.O.W.N Down.

And Now

After Atlas' Destruction, Union's Combined Military Might has been drastically Decreased.

But They are still not done, As Eri is still in the Underworld. Her Prison Cube has been moved to the Gremory Household. The Servants there did what Sirzechs and Rias told them to do, Keep watch of Eri and tend to her daily needs, which was 3 meals.

Eri had numerous nightmares about her Dark Past. She kept waking up, screaming, Crying, or shaking. She thought she was done with it, But the experimentation brought it back.

Her Original Power, Rewind, was dormanted after getting the Gates. However, She kept showing signs of it getting back due to her Horn glowing and unintentionally rewinding the Damage she did to the Cube with her Pickaxe.

Her cuffs were now Wireless, As to give her a way to eat properly, yet still powerless.

In the Overworld. Y/n and his girls were preparing themselves for the Raid. The Underworld is Massive, So finding the Household is easier said than done.

So he brought help with him. He contacted Two friends of his to assist him.

Mustard, The Golem Master

And Killax, The Illager King

Mustard is a Lone wolf that uses Enchanted Golems to aid him. His Two strongest is a Corrupted Golem, And the Warden.

Killax is an Illager who received a Fraction of Power from the Gods. He was hunted for that Power before he met Y/n, He hid him and trained him. His weapon is a Red-steel Axe, The Alloy is unknown, Presumably made from God steel.

Killax speaks in a Dull, and threaning monotone, But It's in another language unknown to the rest of the world exception of Pillagers, Illagers, And Gods.

The Corrupted Golem is one of his oldest and strongest creations. Immense Strength, Speed, Intellect, And Quadrupelism Movement. Has Secret Swords and an Explosive wand.

The Warden is the Newest addition to his army. It uses Sound to identify it's opponents location. It's roughly the same as the CG, But Way Stronger, And no weapons. And if the Opponent figured out his Sight weakness, It can shred it's tough scales for a Chance to see.

Now onto the story. Y/n was talking to Mustard.

Mustard: So you require my Help, Gehehe.

Y/n: I do. What are your conditions

Mustard: Resources. Hundreds of them for my Army. *cue villager noises*

Y/n: You've got a Deal, Mustard.

He laughed like a Maniac before Y/n went to find Killax. Last he heard, He was in a Raid on a Desert Outpost or Base, inhabitants, Players.

The Base was being raided by Both Killax, And Herobrine Vessels. Apparently, The Resistance are the inhabitants.

The resistance Tribe consists of almost every Player in the world, banded together to fight off The Villager Kingdom and Atlas. Now Atlas is out of the way, Their focusing on hitting them.

So to mask identity. He used his Blue Demon form and dashed around the place.

He found Killax. But He was fighting several Resistance members, Strong ones. He's struggling, But managing.

So I took my stance and threw my Trident. It struck a player, but survived. So I threw four more at the other players.

Y/n: Electrify

Electricity cackled on the Tridents and Electrified the Players, Greatly injuring and paralyzing them. Killax took the chance and killed them.

I jumped down from my spot and walked to him. He noticed me and sheathe his Axe.

Killax: *in his language* Y/n. What brings you here?

Y/n: *in the same language* I need your help.

Killax: I will do it. I owe you after all.

Killax rode on his skeletal horse and followed Y/n as he ran back.

Timeskip

Y/n, His wives, Mustard, Killax, and Rose's Parents are hiding while looking at a Portal. The Portal leads to the Underworld, But guarded by The Devils and Fallen.

Y/n: Now how do we get through them?

Nezuko: I have a plan.

Y/n: Nezuko? Why are you here?

She went out of hiding and charged in with bones and Blasters.

Nezuko: LEEROYYYYYY JENKINS!!!!

When she charged. She immediately killed the guards.

Rose: Oh my god she just ran in?

Pneuma: Save her. Stick to the plan.

Nezuko
-Achievement acquired: Leeroy Jenkins

Take 2

Y/n: Now how do we get through them?

Rose: I have a plan

Rose walked out and got the guards attention.

Devil #1: Freeze!!

Rose struck a pose and did a dance. To be specific, The Distraction dance.

The devils were confused, but they were tempted to dance aswell. Soon enough, The devils were dancing.

And eventually. The Group got distracted aswell and danced.

Rose
-Achievement aquired: "You have been Distracted"

Take 3

Y/n: Now How do we get through them?

Rose: I have a plan.

Vorzechs: Y'know what? Naw. This calls for some bold action.

Vorzechs flew up and dived down at the devils.

Vorzechs: I'm the bold action MANNN!

On impact, A small explosion of dust happened. And Vorzechs walked out, dusty and with a smile on his face.

Vorzechs: I've always wanted to do that.

Vorzechs
-Achievement acquired: "Bold Action"

Some of the grouo had a Bruh face. But Y/n had a smile.

Genesis: Aaannnyyyways. Let's get to work.

The group: Right!

The lot entered the portal. But they separated and landed on different parts of the Underworld.

Killax is with Mustard.

Vorzechs with Iri and Rose.

Y/n with Pneuma and Genesis.

The three groups sticked together and searched everywhere.

With Mustard and Killax

With Mustard's Golem Scouts and Killax's Vexes scouting ahead, They were able to cover alot of ground and ambush devils.

Killax: Such weak creatures.

Mustard: Ahaha, Never underestimate an opponent. You will never know what they have in store, or hiding.

A Super-elite class Devil suddenly appeared and attacked the two. These class of devils are Far superior to Elite classes.

The two were able to dodge it's attack, which created a small crater on impact.

Killax: *mind* He's tough.

Mustard summoned 3 Enchanted Golems and they attacked it. The Teamwork of the 3 is impecable and coordinated and they were able to gain the upperhand easily, But The Power is too much for them to handle and One by one, They were disposed of.

Mustard: *angry* Grahh! You! You go on ahead! I'll take care of him!

Killax: Understood.

Killax rode off the somewhere, leaving Mustard to face this Devil.

Devil: You will die screaming!!

Mustard: I don't think so.

Mustard pulled out a Destruction Eye and called one of his Elites.

Mustard: Hear my Voice! Heed my call! Destroy my Enemies!

The ground shook as a new combatant entered a Battle, The Warden.

Warden: *Warden roar*

The devil charged at the Warden, And using sounds of his footsteps, The Warden was able to fight back.

The Warden was very slow at first, Giving the devil an advantge. But every time their Fists collide, The Warden was getting faster.

Elite Devil: Gotta end this quick! Incineration blast!

The devil cupped his hands together and fired a Beam of Radiation and Fire. The Warden hears the beam coming and raised it's arms to block. The devil can see the outline of the Warden, thinking a Statue of Ashes were left.

And when he finished. The Warden only had burn marks and A glowing chest. It retaliated with immense speeds that The Devil isn't aware of and got beaten down by it's punches.

Mustard was laughing like a Psycho, expecting to see the outcome.

Mustard: Never, I repeat Never underestimate your opponent. You never know what they have in store.

The Warden punched a hole through the Devil's chest as it pounded it's chest with its other hand as it roared in victory.

Gremory Household
Eri's Prison Cube

Eri has been thrashing around her Cube recently. Her Horn has been glowing and her body is very itchy. Her screams can only be heard by ones near the cube, Which is Rias and Akeno

The two Devil girls have been observing her for the past hour. They have been wondering why is she screaming, or why her horn is glowing.

However. Eri may have an idea. Her previous quirk.

Rewind

With the Protag and his two girls

The two were nearing a Household. Thanks to a Convniently placed Map of the Area. It showed a nearby household, but it never showed the name.

They circled the area and pieced the info together, soon they figured out it was the Gremory household with the Fancy red colors and Red emblem.

They were about to enter, until a Devil came flying out and onto the ground. Killax came out with his axe drawn.

3 more devils came flying and onto the ground. The one that did it showed himself, It was Mustard, with his Golem Tentacles and 2 warriors.

5 more devils did the same as the Demon Family came out with smiles and grins.

The group reugrouped and looked at the household.

Iri: So how shall we do this?

Rose: Mom. Can Me and Y/n take care of this? This is personal.

Iri: As you wish. Shall we leave?

Y/n: Yes. This may be bloody

The rest of them left, leaving Y/n and Rose.

Y/n: Shall we love?

A red portal appears and someone dashed into the underworld and attacked Y/n. He drew the Legendary sword for Quick Blocks, And he knew who it was.

Y/n: Hello Pervert.

Issei: Shut up!

Y/n: Rose. Get Eri. I'll take care of him.

Rose ran inside and looked for Eri.

Rose POV

This household is huge. I used my magic to track Eri's Power. I sense a Large Source, Similar to Eri's, But something was off. It felt, different.

I rushed to the source and found a Doorway to a basement. It's locked, So I just used the key I found, My Kick.

I kicked open the door and found a stairway down. I ran down and found Eri sat down, But she was different.

She was an ADULT.

Eri: MOM!!

3rd POV

She dashed and banged the Cube. Rose searched the place for a switch and found one. She flipped and thr cube dispersed, Finally freeing Eri from her Prison.

The two ran to each other and hugged. Eri was crying, happy to be free and to see her Mother.

Rose: Come on now Eri. Let's get your Father and go home.

Eri: Okay.

The two went outside. But was beyond shocked to see only Issei celebrating.

Issei: I killed him! I finally killed him! Finally!

He ran off before Rose can do a thing as she broke down crying now that she lost her Husband. So did Eri.
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Somewhere else
3rd POV

In a far away place. A Great Seer is looking through the future as a person is, wanting to know Earth's Future.

Seer: I see......Danger....Danger from Extraterrestrials!!

The man wrote it down and ran off.

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In space

A person has landed on a planet devoid of Life, But Abundant of Nature. He looked around and saw a Girl, standing on a Tree.

Girl: You have shown yourself boy.

To be Continued

Next time

The Mightiest Battle

Sneak Peek

???: You are nothing ???. You're weaker than before.

??? #2 : I will fight on no matter what!

??? #3: GATE OF GAIA, OPEN!

??? #4: INSIGNIFICANT FLEA!