StriderPhantom here. I have returned and welcome to the 15th story of the Danny Phantom/Marvel Cinematic Universe Fanfiction crossover series, better known as DPxMCU. This is also the second collaboration story with fellow fanfiction author Mikaela2015 and her Phantom Twins Fanfiction series, which she's calling the story in her character's perspectives, The Phantom Twins: Return to the Second Dimension. Looking forward to writing with Mikaela2015 again. Anyway, if you're new to the series, you'll need to read these following stories in the series' chronological order before reading this one in order to catch up.

THE FENTON CHRONICLES

GHOSTLY AVENGER

DANNY PHANTOM: THE ASGARDIAN DRAUGR

DANI PHANTOM: THE ROGUED DRAUGR

GHOSTLY GUARDIANS

GHOSTLY GUARDIANS VOL 2

GHOSTLY AVENGER: AGE OF ULTRON

GHOSTLY AVENGER: CIVIL WAR

DANNY PHANTOM: THE ULTIMATE RETURN

GHOSTLY AVENGERS: RAGNAROK

DANI PHANTOM: THE DIMENSIONAL WAR

GHOSTLY AVENGERS: INFINITY WAR

GHOSTLY AVENGERS: ENDGAME

DANI PHANTOM: THE PHANTOM WAR

I have also written a few DPxMCU one shot stories, and writing the DPxMCU spinoff one-shots TEAM PHANTOM: NEXT GENERATION, which you can see all on my Devinatart.

Disclaimer: I do not own Danny Phantom and its characters. They belong to Butch Hartman, Viacom International and Nickelodeon. I also do not own the Marvel Cinematic Universe and its characters. They belong to Marvel Studios. I also do not own any of Mikaela2015's characters. The remaining fictional characters are mine. Well, I present you DANNY AND DANI PHANTOM: THE SECOND DIMENSIONAL WAR!

Prologue: Distress Signal.

[2018]

A major ghost battle was taking place at the ghost dimensional plane known as the Keep between Queen Hertha and her Harvester army and Team Phantom, and interestingly, alternate versions of Team Phantom. The battle has pretty much ended in Team Phantom's victory, mainly thanks to Dani's efforts. Dani had battle Hertha on her own and became the victor. Dani looked at her surroundings knowing that Hertha won't be harvesting worlds, especially Earth, anymore. She sees Danny in the distance and started to walk towards him. Unknowingly however, Hertha has emerged from the rubble, cut and bruised. She sees that Dani has ruined her harvest and is about to evacuate. Hertha was about to attack Dani, but Danny noticed.

"Dani, look out!" Danny hollered.

However, Hertha shot a ecto-energy blast and struck Dani, making her crash to the ground and getting injured.

"Dani!" Danny hollered.

Danny retaliated by launching the Ghost Zone missile. The missile flew across the Keep and struck Hertha, sending her crashing through the rubble. Hertha struggle to get free and she was too weak to go intangible. Hertha then look to her right and saw a device that wasn't damage. She realized that her distress beacon wasn't damaged. Hertha knew that it was the only way she can call for reinforcements as well as one of her siblings. Hertha then use her strength to emerge from the rubble once more. She was definitely cut and bruised, parts of her suit was torn and she was too weak to fight back. She started to look for Danny and Dani, but they, as well as both Team Phantom and alternate Team Phantom, were nowhere to be seen. Only her remaining subjects are present. She then noticed the missile laying to rest in front of her and looks at it. She sees a display panel showing the countdown clock and stares at it in horror.

5... 4...

Hertha immediately grabbed her distress beacon and immediately sends a distress signal, hoping that one of her siblings will receive it. Hertha once more looks at the countdown once more.

3... 2... 1... 0.

At that moment, Hertha then sees a flash of light before everything went black.

BOOM!

The ecto-nuke detonates and unleashes the massive harnessed power of the Tetrahedron in a massive ecto-nuclear explosion, destroying and vaporizing the Keep and killing Hertha and the Harvesters, wiping them from existence.

[2024]

It's been 6 years since the defeat of Hertha and her Harvester faction. At an alien planet as well as its Ghost Zone dimensional plane, a major war and both a ground and air battle was taking place between the planet and its Ghost Zone dimensional plane's inhabitants, and a much larger and powerful Harvester ghost army. Of course the battle is in the Harvester's favor. At the battlefield was a large towering structure that was shooting a bright green ecto-beam towards the ground, as it drills into the soil. It was a large ecto-drill as it's extracting the planet's resources for the harvest. Circling around the drill was a very large space-ship like aerial fortress called the Keep II. It had very large wings, 8 thruster engines, 2 of them larger than the rest, and it had many defensive positions around it. It was shooting missiles from ant-air missile launchers from the top of the dorsal wing's surfaces as well as very large missiles for long range attacks. It was also shooting pulse ecto-beams from the wing's undersides. It was also launching multiple drones from launch bays that are under the wings and the drones started to shoot down any of the native craft that intends to shoot at the massive aerial ship. The Keep II was also shooting a very bright ecto-laser beam from its nose, destroying the ground and air forces of the planet's natives. The Keep II continue to fire its defensive measures against the planet's natives and ghosts of its Ghost Zone dimensional plane, destroying any that gets near it. Suddenly, at the top of the craft, it projects a large halo of energy before generating a large blue ecto-shield, destroying incoming projectiles and native space fighters that are caught in the field, as well as to protect itself from incoming attacks. Inside the Keep II, the Harvesters were doing their jobs in destroying the planet's natives and ghost natives. The Harvesters looks just like Hertha's Harvesters, except their skin is blue and wearing blue and black armor. They still have the same black headdresses. In the throne room, there was a ghost woman. She looks like Hertha, but she has glowing blue eyes, dark blue lips and very deep blue hair that flowed straightly down behind her. She wore a blue and purplish suit that showcases her figure, had purplish gloves and purplish boots with heels that went to her thighs. She was monitoring the harvesting progress and the battle through her monitors while her subjects give her information.

"Your Highness, harvest is going according to plan. Soon you'll have another successful planet harvest and these worthless natives and its Ghost Zone natives will be nothing but extinct and their Ghost Zone dimensional plane will be destroyed, especially now that half our army have been resurrected." a Harvester said through telepathy.

"Princess Camila, Your Highness, some of the natives and ghost natives are trying to escape." another Harvester said telepathically to the ghost woman, named Camila.

"Order some of our fighters to shoot them down. Not one is to escape. The last thing we need is some joining my sister's resistance force." Camila said through telepathy.

"As you wish, Princess." the Harvester telepathically.

Suddenly, one of Camila's monitors started to beep. Camila looks at it and couldn't believe it at first.

"A distress signal? It can't be." Camila said.

Camila then touch the distress signal icon on the touchscreen. The screen then shows the battle at the Keep, as well as Team Phantom and alternate Team Phantom fighting and destroying the Harvesters. It then show Dani defeating Hertha, Danny launching the missile and Hertha's demise as well as the destruction of the Keep. Camila became enraged that a Harvester force has been destroyed and Hertha being killed. Camila screamed in rage. Another Harvester then show up in the throne room.

"Did you see that distress signal?" Camila asked telepathically.

"I saw, Your Highness. I now sense that Her Majesty Queen Hertha is indeed dead." the Harvester replied telepathically.

Camila then drop to her knees and scream once more in rage and fury.

"I will avenge you, sister! Your death will not go in vain!" Camila shouted.

"Your Highness, because Hertha is now dead and you're the second heir, that means you are now the new Queen of the Harvesters." a Harvester said telepathically.

The Harvesters presented in the throne room then bow before their new queen.

"All hail, Queen Camila. Long live Queen Camila." the Harvesters said telepathically, showing their loyalty to their new queen.

Camila then look at the distress signal again and saw Team Phantom on the screen.

"Those ghosts and creatures. Where are they from? What planet?" Camila asked telepathically.

"They're from a planet called Earth your Majesty." a Harvester replied telepathically.

"Earth. I heard about this planet. I heard Hertha had some sort of trouble the last time she tried to harvest this planet. I thought the inhabitants there were primitive and doesn't have any advance defenses." Camila said telepathically.

"They look like they've advanced, your Majesty." a Harvester said telepathically.

"Doesn't matter. Commander, speed up the harvest on this planet and continue our recovery operations. And send some scouts to find those two that fought Hertha and launch that weapon against her. After this harvest, I want the pleasure to kill those that kill Hertha because our next harvest target is Earth!" Camila said telepathically with vengeance.

"Yes, your Majesty." the Harvester Commander said telepathically.

Camila then look at the monitors that show Earth, Team Phantom and Hertha.

"Don't worry, Hertha. I will finished what you started and desired." Camila said with vengeance and a evil grin.

And that's the end of this prologue. Well, looks like the Harvester threat isn't over than we thought. Wonder what Hertha's sister Camila has up her sleeve. You'll all see how dangerous she is. Anyway, we will see what danny and Dani has been up too ever since their memories were wiped from knowing about their future kids and the battle against Gandr after the events of DANI PHANTOM: THE PHANTOM WAR. Don't forget, this is DPxMCU story is the second collaboration story with Mikaela2015's Phantom Twins series, so be sure to read her story, which is called from her character's perspectives, The Phantom Twins: Return to the Second Dimension. I hope you all will enjoy this story as well as Mikaela2015's. Please review. :)