EarthThe next day

Everywhere on the planet, humans proceed to go about their business as usual. Parents shopping, children going to school, newly minted Guardians fighting in Fractures and going to their Guardian Universities.

But everything comes to a grinding halt when the moon all over the world – one that has been blood red for days now – finally begins to blaze with an eerie black and red flame with droplets of blood seemingly falling off of the tips of the fire. And as if a fire was sparked in every last demon on the planet, black and red flames begin to lightly taste each and every demon’s skin without harming them in the slightest. And from those flames, droplets of blood start to fall off of every tiny flame licking at the air around them, soon covering the ground in any location filled with demons all over the planet with blood.

Screams echo from all over the world, but thanks to the planning of the government and the Associations, Class IV Guardians stationed all over the planet quickly begin to deal with any demons that make it past the Fractures, the barriers no longer responding to the demons and instead letting them pass through. Meanwhile the demons that had all gathered around the frontlines over the past couple days finally let out one synchronous roar before charging straight towards the human Guardians who meet them halfway.

Lastly, a ball of blazing hellfire enhanced by the black and red flame of the Demon Moon shoots across the sky over the demons and humans, making a beeline straight towards the Headquarters of the Republic. And within less than a minute, the ball of black and red flame stops right above a large fortress spanning several thousand meters in radius. It then turns into an oni with medium length crimson hair, glowing crimson eyes, two black horns stretching in a narrow arc, and glowing black and red veins covering his bare torso, armor only being on his lower half, shoulders, and hands.

But he’s not alone as above the fortress, three figures can be seen floating in the air, and not a single human aside from them can be sensed from the base itself.

Of the three figures, one has ocean blue hair and is floating with various tentacles slowly moving around him stretching out of his back, through his medieval styled blue armor. And when his eyes lock onto the oni floating before them, they narrow, his hands turning into tentacles from his fingers up.

Another of the three figures, a man with wild red hair and glowing red eyes, floats several meters away from the first as he grins widely at the oni with one of his arms holding a helmet to his side. A helmet that he soon raises and puts on over his head, the eye sockets of the helmet soon flaring with a deep crimson light as he summons a black and red sword coated in hellfire to his side.

And the last of the three figures standing in the middle of the first two, a woman with long stark white hair without a hint of color, stares at the oni without any emotion on her face. Meanwhile white specks of energy appear all around her, simply absorbing anything they come across be it air, light, blood, or even fire or water from those to her sides as the woman summons a black sword into her hands. One that is made of pure null magic despite its color, matching the black and white medieval armor she has on and the cape blowing in the wind behind her.

A single second passes in silence before a large dome of red and black energy a different shade from the energy and colors of a demon, a darker and more sinister shade, forms all around them and the base, spanning several thousand meters in width. And it only takes a moment for everyone within to feel the sinister energy of the destruction magic filling the dome. One that is blocking a fifth of the Demon Moon’s light. And at the same time, destruction magic can be sensed from those within the dome from every battlefield across Earth, even if the source of the magic isn’t powerful enough to badly harm a Class V.

The oni grins and raises his voice, “So you brought your little monster to the fight, did you? Maybe I’ll be able to capture the disgusting creature this time.”

Silence fills the space as none of the Knights feel any urge to defend the patriarch of the Knights despite two of them being his children. Then Satan frowns as he realizes the man in question isn’t within the dome.

“Coward,” he states, his frown soon turning into a scowl. But it doesn’t last long because when his gaze turns back to the Red Knight of Humanity, it turns into a bright smile as he declares, “Red Knight, we meet on the battlefield again at last!” Then his eyes narrow. “But this time you won’t be making it out alive.”

Black and red flames begin to gush out of the man along with blood sourced from the flames, enhanced by the Demon Moon whose light still manages to shine through the destruction magic dome a little bit, the source of the dome not being powerful enough to block most of the light. And in response to the flames, black and red flames gush out of the Red Knight as well, along with a pure white light from the White Knight, and torrents of water from the Blue Knight.

Then shadows start to fill the dome from the Black Knight who is hidden from view at the same time as a bright purple flash that combats against the Demon Moon’s light even more, blocking a third of it while letting the remaining light empower the oni.

“Let the true war of the species commence!!!” Satan shouts, his voice echoing out of the dome and all the way through to the battlefields where his demons are interlocked with the humans. And all across the planet, demons can be heard shouting the very same thing as Satan shouts with a wave of hellfire directly towards the Knights.

“For the Demon King!!! For His Majesty!!!”