Hey there, this is the second chapter of this mashup of fics. I saw that a lot of people like this story so far. My reason to make this fic is to make a harem protagonist discover that he isn't the all mighty king of everything. Because the Izuku on the MHA X DxD fic gets so overpowered by the end of season 2, that only Shigaraki can beat him. But I dont know, the author still has no plans for that, besides that's set in a world where Stain and Todoroki are stronger than fucking Baraquiel and Kokabiel. That's a rant for another time, plus it will be cool to have the One Piece villain dominate everyone. Now let's go.

Remember this will take place after chapter 1000, so we have Luffy, Zoro, Law, Kidd and Killer vs Kaido and Big Mom on top of Onigashima.

On the One Piece universe

The battle of Onigashima was about to fully start. 5 members of the Worst Generation were about to go head to head against 2 emperors, something that this world has never seen before. Both Kaido and Big Mom were snickering at the thought of those small pirates actually going on and trying to be taken them down.

''You brats are braves! But this game stopped tonight!'' Said Kaido.

''Mamama! I am going to make to enjoy killing you all slowly.'' Said Big Mom.

The supernovas just glare at the two Yonkos, not scared at all.

''You punks are no near strong enough to hold the title of King of the Pirates. A lot of people like you all have come and went ever since Roger died, to hold that tittle you have the strongest of the strongest.'' Said Kaido.

''Exactly, its time to rid the world of pest like you all. Don't worry, your crew shall accompanied you all very soon.'' Said Big Mom.

The two emperors were charging up their weapons with Haki, the sky was already feeling like it was going to crack open from all that power. The group just saw that and only had one idea in mind.

''Here it comes. If we don't do something is the end for us all.'' Said Law.

''Shut up Trafalgar, I am not blind!'' Scream Kidd.

''This looks bad, my rubber powers aren't enough to counterattack that.'' Said Luffy.

''Agreed captain, we can joined attack again.'' Said Zoro.

''We might have a chance if we combine everything.'' Said Killer much to everyone shock.

''Uh?' Asked the group.

''What do you mean Killer?" Asked Kidd.

''If we combine some of our strongest attacks with Haki, we might have a chance to counterattack this combo. It might be tricky but its our best shot.'' Said Killer.

''Agreed, we shall do this.'' Said Law.

''Alright!'' Scream Luffy.

''I hate combo attacks, but to live another day I guess I have no other choice.'' Said Kid.

''Same thing.'' Said Zoro.

The group soon activated their haki, the conquerors users were already with their will at full power while the weapon holders charged up armament in their attacks.

''Here it comes.'' Said Law seeing Big Mom and Kaido.

''Raimei Hakke!'' Scream Kaido.

''Napoleon! Charge!' Scream Big Mom.

The attack was equal to a powerful blast that could wipe out an island, but the Supernovas weren't weak. They were more powerful than most of the pirates of the New World, and now it was time for them to prove their points.

''Gommu Gomu no….''

''Radio...''

''Punk...''

''Kaama...''

''Santoryu...''

The five soon let out their attack, which soon connected with the powerful blast from the emperors.

''Red Rock/Knife/ Gibson/ Daisen Sekai/ Rengoku Onigiri!''

The attacks soon meet up and the impact was big, enough to destroy a New World Island.

However something different happen this time, due the great amount of haki and will power being put around these attacks was enough to scare even those in the realm of the Gods.

At Heaven.

Some gods and angels were watching the fight between the Supernovas and the Yonkos. However, once that clash happen something started to go wrong, everyone that was an angel, or a God felt a huge cold sensation in their spine.

''What is going?'' Asked an angel.

''Oh no! They couldn't!'' Scream the God checking the systems.

''Explain to me!" Asked the angel.

''Is the pressure and the amount of Haki being released. We thought nobody could ever achieve something of this magnitude again!" Scream the God in fear.

''You mean…'' Said the angel in fear.

''Yes, they will open.'' Said one of the Gods.

''No! Not again!'' Scream the angel.

Back to the fight.

The clash ended and after the giant collision something started to happen to the sky, thunder started to erupt, but it was bigger than the ones caused by Kadio.

Booom

Boom

''What is going on?'' Asked Luffy looking at the sky.

''Kaido! What did you do?" Asked Big Mom.

The Sky soon started make a weird sound, so confusing that even the fighters stopped to brawl to look up.

At Wano.

The country was having a good time at the fire festival, since they didn't know about the war that was going on in Onighashima. However, some people saw something in the sky that was a bit weird.

''What is that?" Asked Toko.

''Is that a star?" Asked Hantengu.

Back to Onigahsima.

The Sky soon started to open some kind of hole, something that has never been seeing before and in just a second Onighashima felt like it was being sucked towards that opening.

''What is going?" Asked Kidd in confusion.

''The island is being dragged to that hole!'' Scream Law.

''Why is doing that?" Asked Kidd.

''like I know everything!'' Scream Law.

''Luffy we need to get out of here!'' Scream Zoro.

''Right!''' Said Luffy.

''We need to call out our crews! Before it's too late.'' Scream Killer.

The Supernovas got out of the roof while Kaido and Big Mom just wonder what the hell they just did.

Inside of the Skull Mountain.

The rebellion was at full force going up against the Beast Pirates and the forces of Wano under Orochi, while the former Shogun was dead (for now) they were all still following Kaido, however the fight stop when they heard a loud thunder that could make everyone stop dighting.

Krakom

Everyone inside didn't know if this was between Kaido and Big mom against the other captains or if it was a huge storm.

Luffy and Zoro soon reached their crews, making them confused of what just happened.

''Everyone! We need to get out of here.'' Scream Luffy.

''What happened Luffy?" Asked Nami.

''I don't know, we just attacked and suddenly…. boom the sky opened a wound.'' Said Luffy.

''What?'' Asked the crew.

Onigashima kept floting in the sky, but now it was getting dragged more and more towards the hole.

Kaido didn't know what was happening, he even transformed again in his dragon form to pull off Onigashima, but the force and attraction at the moment was to big even for him.

''Uh…what is happening?" Asked him.

The whole skull mountain was shaking making everyone there in fear.

At the Basement.

Big Mom pirates had actually made into the Skull Mountain before it was lifted in the air, Perospero though they were all sulking at the bottom of the ocean but they all managed to get back before the big battle started. They were all getting ready to give a surprise attack towards the rebellion when suddenly the loud thunder started to happen.

''Big brother, what is going on?" Asked Smoothie.

''I don't know, I guess Mama caused the sky to be open again.'' Said Perospero.

''I didn't know she could have something like that in her arsenal.'' Said Daifuki.

''When she is angry, she goes beyond the realms of possibility. We all have seen that.'' Said the eldest.

''We should go and check on Mama.'' Said Compote.

''I don't know if this is a good idea big sis.'' Said Smoothi

The island started to shake even more, it was like having a huge earthquake while was the place was floating.

''Traflagar! What will happen if we get sucked with everyone?" Asked Kidd.

''I don't know! We might be send towards somewhere else I guess.'' Said Law.

At the sea

The polar Tank was seeing the floating Mountain where their captain was, they didn't wanted something bad to happen to him, so they decided to act.

''Oh no! What will do?! The captain is still there.'' Said Sachi.

''don't worry! I got an idea!'' Scream Bepo with a large harpoon gun.

The bear mink shoot the harpoon towards a good chunk of stone and made sure that was stable enough for the Polar Tank being pulled.

''I got it!' Scream Bepo.

''Wait a minute, the island is being sucked towards that hole in sky. It doesn't mean we will also get sucked too?" Asked Penguin.

''Oh no…''Said Bepo realizing his error.

Then the Polar Tank was yanked with no problem from the water, pretty much dangling like if was a fish caught in a fishing hook.

''AAAAAAAAAAAAAAH!'' Scream the Heart Pirates.

In an instant the hole kept growing bigger and bigger to the point that swallow the entire Island and dragged everyone that was inside with it. Once it was all passed the whole was closed, because the users of that great power were now on the other side.

Onigashima, the base for the great General Pirate Kaido was now gone from the Waters of the New World and being sent to…an actual new world.

Between dimensions.

The whole island started to spin, to the point that everyone vision was getting blurry. It was like having to sense your inside being turned to jelly and you can just sit there and watch that happen.

''AAAAAAH!' Scream everyone feeling in pain, including the Yonkos.

Soon a large explosion happen, and everyone was sent flying to the air.

Boom

A bunch of Pirates and other people were sent towards this new world, however to different places.

The Straw Hats managed to get together once they got separated from everyone.

Law was sucked out by himself.

Killer and Kidd were together went they were sent out.

Kinemon, Okiku and Kawamatasu were together when this happen.

Raizo and Izou were sent flying to another direction.

Duke Dogstorm, Cat Viper and Denjiro were sent to another direction.

Shinobu and Momonuske managed to go towards a safe direction.

Yamato don't know what was happening as she was sent towards another place.

The Polar Tank was yanked and sent towards one of the sea of this new world.

Hyou and the rest of the Yakuza went were sent to a south part of this New World.

The CP0 used Geppo to get out and see where they would land.

The rest of Onigahsima managed to stay inside. With the beast pirates, Samurais, Ninjas and Big Mom pirates still inside.

While it would take a while for these groups to meet up again, this new world would notice their presence very soon.

With the Straw Hats

At the sky of Musutafu

Luffy and his crew were now falling from the sky at maximum speed, similar at the time in Skypia, but there was no octopus Ballon.

''aaaaaaah!"' Scream Luffy.

''Luffy! What happened down there?" Asked Nami screaming.

''I don't know! We just fought and the sky opened.'' Scream Luffy.

''This makes no sense!'' Scream Nami.

''Wait! Its already morning?!'' Asked Usopp seeing the sky and it was morning.

''Did we missed a whole day?'' Asked Franky.

''No! I think we are in another part of the New World.'' Scream Jinbei.

''This is so scary!'' Scream Chopper.

''We´re going to die in the ocean.'' Said Brook.

''don't worry, I can save us all and swim to another island.'' Said Jinbei.

''Uh… there is a problem down there.'' Said Robin.

''What?" Asked Jinbei.

The group looked down and saw that instead of an ocean there was a city down there, a big one, just like Water Seven.

''A city!'' Scream the crew.

''We are going to get turned into tomato paste if we hit the ground.'' Said Robin

''Stop talking like that!'' Scream Chopper and Usopp.

''Luffy do something!'' Scream Nami.

''Gomu Gomu no ballon!" Scream Luffy going down first and inflating himself enough so the group could bounce in safety.

''AAAAAAH!'' Scream the crew

Bow

The Straw Hats managed to land safely at a park near the city, it wasn't full at this tme of the day so the crew didn't hurt anyone, but their presence was already seen by the people of this new world.

Nearby

All Might, Kamui Woods and Mountain Lady saw the people falling from the sky and were wondering what was that.

''What is going on?" Asked Mountain Lady.

''I don't know.'' Said Kamui Woods.

''We should investigate!'' Scream All Might.

''Right!'' Scream the other pros following the number one hero.

Nearby

A fallen Angel named Dohnaseek saw those people falling from the sky and thought at first that it was new Fallen Angels like him, however the energy around was completely diffently.

''Wow! What the hell!'' Said him.

Soon the man got a call from his boss Azazel.

''Dohnaseek, if you saw what did just fall in Musutafu please tell me. I want to know what is going on.'' Said Azazel.

'Don't worry boss, I´m on it.'' Said him with a glee, if they attack him he could kill them.

The Fallen Angle opened his wings and soon fly to see where those people were.

And we end right here, the entirety of the final War ended up in this mash of MHA and DxD, so in a sense yeah, the three factions are screwed because Kaido and Big Mom are here and there is no chance they can fight them on their own. Do you think Ddraig or Albion can beat Kaido? Please!

Next chapter is set up what is going to happen and then meet up someone I want to introduce.

Also, don't worry about the others, there will be a chapter showing where everyone is.