DEM's Laboratory:
Blood and gore with torn book pages are scattered everywhere the walls, the floor, the machineries, and the ceiling. Westcott who is standing in front of the carnage while there is a dark book floating over his right hand is still wearing a calm expression on his face even though he has a lethal wound on his abdomen. But with his heavy breathing and cold sweats on his face shows he is so much pain.
On the cold bloody floor, there is a black spear and a golden crown with a red crystal attached on the middle are lying there.
Westcott approached the demonic artifacts. As he grew closer to it, murmuring of tortured and suffering voices are echoing inside his head warning him of all the atrocities that was done from their past masters. Westcott just ignored and continued to walk towards it like a moth to the flame.
As he stand over the two artifacts, he picks up the spear first. After picking up the spear, he roared out in agony as his right arms got consumed by dark tendrils like snake which crawled out from the to his arm and consumed half of his body. All of the sudden, a dark ethereal figured with black horns appeared before him. This figure turned into black smoke before entering Westcott's body through his mouth, ears, and nostril. As it entered his body, he started to bleed heavily like waterfall of blood. His skin started to crack and turn dark with his veins showing up as four leathery wings with bony blade sprouted from his back. His hands turned into sharp claws and the powerful force of the demonic energy from the spear destroyed his attire revealing a reptile like scale and clawed feet.
The length of his hair crawl all the way to his back and it changed color from light to dark gray. His eye color turned emerald and pupils slithed like the eyes of the great serpent from hell.
The crown that is lying on the ground got caught by the dark tendrils that are consuming Westcott. The dark energy that is consuming his host consumed the crown with him.
As the transformation is processing, the whole lab shook and rattle like there is a megaquake. The glass containers of experimented humans got shattered and the corpses fell to the ground and they also got caught by the dark energy and Westcott consumed them. The computers exploded after getting overcharged by demonic energy and it damage all the equipments that is near them.
On Westcott's head, grew two large dark horns symbolizing as a crown and his teeth turns from human to a carnivorous animal teeth like those of a lion.
Westcott's agonizing scream turned into a powerful roar that can make the mightiest demons tuck their tails between their legs. And with a final roar, Westcott unleashed a powerful blast of dark demonic energy that shattered the thick walls around the and razed the roof of the building as a blast of dark purple beam went sky high like a beacon.
After the demonic energy calmed down, the demon version of Westcott is standing there in the open destroyed area that was once a lab. He spread his wings wide, wide enough to cover the sun if the world didn't turned into a hellish abyss.
"Beelzebub!" Wescott growled in a dark low booming voice as a dark book appeared floating over his right hand.
The book forcefully opened itself and papers after papers went flying wild through the air. All the papers then started transforming into demonic girls. Claws so long it can easily rip you apart, sharp teeth use for tearing off flesh, tail with a speared end so strong like iron it can pierced through spirit armors.
All the Nibelcoles turned succubus giggled lustfully and playfully and they just floated in the air waiting to be commanded by their master.
"Masterrr... This gift of yoursss... Feels... Sooo... Goooodddd~" One of the girl hissed and moaned.
Tengu City:
"What took you so long?!" Dante asked out loud when he saw a portal in front of him appeared.
Vergil steps out of the portal and sheathed his sword, making the portal behind him close and with time and space fixed itself again.
"Have to deal with one of the summoner's mess. What happened here?" Vergil looks around the carnage in front of him, guessing his brother had been busy when they splitted up.
Dante chuckled lightly and rest his sword over his right shoulder. "Same as you."
"Didn't you saw the blast?" Dante asked and pointed at where he saw the dark beacon.
"Yeah. With a beacon like that, I can feel our hands will be full." Vergil frowned and glared at the sight from where he saw the dark demonic energy
"How about the others? Should we rally them?" Dante asked.
"No, they won't be able to handle it." Vergil replied calmly.
And he continued. "We must make haste, they are planning to use the demons as their weapon."
Dante sighed and said. "They already done it and it will be a doozy to get to that building with them using devil arms. Have you got any plans?"
"Destroy everything." Vergil replied coldly.
"Now, that's a great idea!" Dante smirked.
Suddenly, blood curdling screeches and roars echoed through the dark city as wave after wave of demons suddenly surrounded the brothers.
The brother got into a back to back position, blades ready.
"Hehe they never learn." Dante commented.
Vergil just smirked before him and his brother rip and tear their way towards DEM's building where Westcott is located.
At the sky over Tengu City:
Warning alarm sound and reactivating computers filled the inside of the ship as Shido, Kotori, Elliot, and Karen are regaining their composure after the shockwave of the beacon had rattled the whole ship.
"Is everybody okay?!" Elliot exclaimed.
The rest of the people inside of the ship nodded groggily.
"That blast came from DEM's building, what the hell did you do Westcott?!"
He said inside his head. He gritted his teeth and clenched his two hands at the arm rest of his wheelchair as tiny droplets of cold sweats drips from his forehead.
*ROAR!!!*
The whole ship shook as an unknown creature roared out like a mighty thunderclap. Kotori swiftly runs up to the main large screen of the ship and monitor what is outside. Her pupils turned to a dot and she gasped when she saw what's infront of them.
"What is that thing?! It's so big!" She exclaimed.
Outside the ship, a large serpent is looking back towards them with its four slitted golden eyes. The creature has a head that looks like a crocodile and had a body of the largest whale that existed in the world but with an unpiercable large scales instead of those leathery skin.
Despite it's size and weight, it went charging straight towards the ship with a surprising speed. It spreaded open its mouth showing rows of sharp long teeth like spears.
"Put up the territory immediately!" Elliot ordered.
Just a nick of time, the ship got surrounded by a green barrier which the creature collided into. The creature growled out in pain and quickly retreated back to the dark sky. Inside of the ship, the whole area got rattled by the impact and the people inside went tumbling down as the warning alarm went off.
After the shaking stop, Kotori immediately runs up towards the main monitor and scan the area around them.
"No where is safe around Tengu City!" Kotori raised her voice and sighed.
She was surprised when the green barrier is surrounded by a golden aura and the attack hardly cracked their barrier. She then looks around all of the cameras around the ship and that's when her eyes glimmer when she saw a girl wearing a yellow dress with light purple hair and surrounded by pipe organs looking at her back from the camera.
"Miku!" Kotori yelled out with joy seeing one of her friends in one piece.
Shido quickly runs up to the main monitor and smiled warmly and said to her sister.
"Teleport her inside the ship."
Miku got surrounded by golden aura before turning into star dust and vanishing out of thin air before reappearing inside the ship with a flash of light. Shido with Kotori sprinted toward sees her and tackled her with a hug.
The three shared laughter as tears of joy drips down over their faces.
"Darlin, Kotori! I thought I will never see you all again!" Miku cried out.
Suddenly, Miku broke out from the hug and went into a panic.
"We must hurry! I saw Yoshino with the others crashed through the building! They are being chase by this giant skeleton thing!" Miku cried out.
Shido, Kotori, Elliot, and Karen all stared at Miku with a terror-stricken look.
Kotori immediately runs up to the commander seat and took control of the ship. Sensors activated, turrets activated, and defensive system up; they traveled through the darkness searching for their friends and hoping they are still intact into one piece.
Tengu City, Abandoned Building:
Yoshino and Natsumi stayed hidden inside of an another building after escaping the giant demonic skeleton.  Both of them are sitting on the floor with their back pressing against the wall. Infront of them are their unconscious friends covered with white blankets. Everything was very silent... for now. All they could hear was the calm breathing coming from Origami, Tohka, Yuzuru, and Kaguya. The entrances around the inside of the building even the windows are covered by thick ice barricades. The atmosphere inside the wide room is cold but tolerable.
"Will this ever end?" Natsumi said quietly, her eyes are staring at her wounded hands.
"I hope the others are okay..." Yoshino said softly as tears starts to form on her eyes which Yoshinon immediately wipes it away.
After a few moment of silent...
"Are we just going to hide here forever? Is our power that useless against all this monsters?" Natsumi asked.
Suddenly, a large portal appeared infront of the spirits. Natsumi and Yoshino's eyes went wide in fear as they ready themselves from whoever or whatever is behind the portal.
The portal spits out three familiar wounded girls breathing and gasping for breath.
"L-Looks like... we finally ended up in the right place." the gray haired girl, Nia chuckled weakly before falling unconscious and her astral dress disappeared in a flash of light.
Mukuro is already unconscious and lost her spirit armor, Kurumi and Nia just have to drag her out of the portal. With Kurumi though, she's trying to not fall on her knees but failed to do so.
Yoshino and Natsumi came running towards the three wounded spirits. They can tell that these three have the fight for their life before arriving in here. Kurumi looks behind the two young spirits and she noticed Tohka and the others.
"L-Looks like you all have it hard also." She weakly chuckled.
She then continued. "No matter where the portal of Mukuro-chan takes us, there are those monsters everywhere... I guess we are just lucky to ended up here..." Kurumi's voice faded and also lost her consciousness as her astral dress turns into dust of shadow.
Before her body hits the floor, Yoshino and Natsumi catches her naked figure. The two of them drag the three spirits beside of the others and they searched for an extra blanket to cover their naked body to keep them warm. The two young spirits sat on their original place before Natsumi sighed out her frustration.
"Looks like it's only you and me now Yoshino." Natsumi said sadly.
Yoshino hugs her knees and said. "I hope Shido-san and Kotori-san is okay..."
She felt a comforting hand on her shoulder. When she looks up she saw Natsumi's warm comforting smile. She saw this as a glimmer of hope.
DEM's Laboratory:
The walls and the ceiling got erased, turned into dust from the sheer power of the new monstrosity, the new king of hell. Westcott labeled himself as a fallen God... A God of Destruction.
He looks through the distance and at the dark horizon are flashing blue and red lights eliminating his billions of horde of demons one by one that's lining up from his territory to where the sons of Sparda's location. Behind him, standing Artemis and the once known the most powerful wizard in the world, Ellen.
Instead of wearing her usual gear, Ellen is now wearing a kimono that is white as snow. Her hair turned from blonde to black. Her skin is really pale like there is no blood running through her vain and her eyes turned from purple to white like a lifeless corpse. On her right hand, she wields a katana that's emitting steam of frost. If everyone is near her, they will get a froze bite from the aura that surrounds her.
The trio looked on over the once beautiful place that is filled with hope and dreams. People always smile even though there are spacial quakes wrecking havoc around the city. Now it is just a dark empty shell of a beautiful city. It is now the playground of hades.