I have rewritten the chapter for you, keeping the word count similar and maintaining the original plot and character interactions.
Everyone watched, dumbfounded, as Advika's attack shattered Darkness' concentrated beam of light and slammed into him.
BOOM!
Darkness lost his balance, plummeting thirty meters through the air.
BAM!!
"...So powerful?!" Leyla gasped, stunned.
"Just enjoy the show," Christopher said with a smile.
BOOM!
Darkness burst through the shattered rocks and debris, standing up as the dark energy that had cloaked his body completely vanished.
"Huh?! Darkness is a woman?!" Christopher was stunned, staring at the red-haired lady on the ground.
Extinction, Death-flames, and Eagle-eye were equally dumbfounded, having all believed Darkness to be a man.
"How dare you!!!" a dense wave of death energy erupted from Darkness, rippling outward. The stones around her shattered into pieces as a pillar of dark light shot into the sky.
"She... she's forcing a fusion!" Tiamat yelled at Christopher.
'Fusion?! That's not possible, you said only tamers above the Ascendant rank can achieve this!' Christopher thought.
"That's why I said, forcing! We should stop her!" Tiamat insisted.
Christopher didn't move. He had never seen anyone fuse with their beasts before, so he decided to sit back and watch the spectacle. Advika stood in the sky, watching and waiting.
"I will kill you, Fire Goddess!!" Darkness screamed. Her dragon turned into a trail of light and flew into the dark pillar of energy.
BOOOM!!
A powerful sonic wave burst out, sending Extinction and the others flying backward. When the smoke dispersed, Darkness was revealed, now with long black wings, dragon scales, and two huge horns protruding from her head.
"This form boosts my powers to that of a Grand Ascendant rank. You can't win against me," she said coldly.
Advika stared at her for a moment, then raised her sword into the air.
BOOOM!!
The sky tore open, and Hellfire flew out, swallowing Advika whole.
"...?!!"
Everyone was stunned speechless.
"Did that beast just swallowed Advika?!" Leyla asked in mild horror, turning to Christopher.
'Don't tell me she's—'
"Yep... she's also forcing it," Tiamat answered before Christopher could finish his thought.
'Are there any side effects?' Christopher asked.
Tiamat landed on Lazarus's back and lay down. "There are always side effects. She could lose some of her powers, memories, beasts, or strength..."
'You don't know, do you?' Christopher looked at her over his shoulder.
Tiamat glared at him. "Or maybe she'll die! There are a lot of side effects; I can't remember them all!" she yelled.
Christopher just shook his head and turned his attention back to the battle. "Hopeless," he muttered.
"What happened?" Leyla asked, confused.
"Nothing," Christopher answered.
Leyla pointed at Darkness. "How did she do that?"
"You mean fuse with her beast?" Christopher asked, and Leyla nodded.
"Yes..."
"You aren't strong enough yet—"
BOOOM!!
Christopher's words were cut short as Hellfire exploded into waves of flames. Standing in the center was Advika, her skin now a fiery red and two huge dinosaur wings protruding from her back.
"Then what about her?!!" Leyla yelled, pointing at Advika.
"Advika's situation is kind of special and strange at the same time. I'm also trying to figure it out," he said.
Leyla nodded slowly, her face filled with questions.
"You?" Darkness was shocked. "Forget that! You must die!!" she said, spreading her wings and shooting towards Advika, who spun her flaming sword and lunged at the charging figure.
BOOM!
Christopher, Leyla, and Tiamat silently watched the battle as the two exchanged more than twenty moves in less than two minutes.
BOOOM!!
The two combatants flew backward, smashing heavily into the ground.
"How is she so strong?" Christopher asked aloud.
"Oh, my good disciple... that isn't Advika fighting."
'Huh? What do you mean by that?' Christopher asked, a frown on his face.
"That is the Fire Spirit... my elder sister," Tiamat revealed.
'Wait!! Elder sister?!' Christopher turned to Advika in shock, his reaction confusing Leyla, who couldn't hear or see Tiamat.
"Just you wait, Fire Goddess, when I release my two beasts... I will personally kill you!" Darkness hissed.
"Do you really think you can escape?" The Fire Goddess scoffed. "You attacked my successor. What do you think is the penalty?" she asked coldly, her eyes blazing.
Darkness sneered. "Fight my soldiers!"
She snapped her fingers, and a huge gateway opened before her. Men and women in black and gold uniforms, all super soldiers, marched out.
"Retreat!" she yelled at Extinction and the others, then shot into the air, flying away.
"Thinking of running!!" Advika spread her wings, but before she could move, countless beams of light shot towards her.
"...?!"
BOOOOOOM!!
"You lowlifes!!" she yelled, throwing her sword at the fleeing figures.
"Stop it!!" Darkness commanded, creating a gateway before her.
Extinction turned to the flying weapon and activated all his life-force energy, creating a shield.
"Done!" Darkness called out, flying into the gateway. Death-flames and Eagle-eye quickly followed.
WHOOSH!!
"...?!"
Extinction watched in horror as the flying sword smashed into his shield, shattering it like fragile glass. The blade struck him, sending him flying backward and vanishing inside the gateway, which closed behind them.
Seeing Darkness had escaped, Advika's eyes turned blood-red. In a frenzy, she lunged at the experimental soldiers. "None of you will leave here alive!!" she screamed.
__
"Is that still Advika?" Chloe whispered, clearly frightened.
"I don't know," Adonis answered, equally lost.
The group stood ten blocks away, watching as Advika tore through the soldiers one by one.
"She's so cool," Katherine said with a smile, causing Chloe and Adonis to stare at her with a frown.
__
[Five minutes later...]
WHOOSH!!
Lucas, Reaper, and Death finally reached the location. The three beasts moved their gazes around the gruesome scene before them.
"What happened here?"
Lucas turned north, seeing Sunny, Xing, Garrett, Ragnarok, and Phoenix rushing over, with Electra and Alex following some distance behind them.
They all stopped before the three huge beasts and turned their heads to the center of the carnage. Advika turned to face the newcomers, her pink hair, face, and body now covered in blood.
"...?!"
The group instantly went on guard, ready to defend themselves.
"Hold on, everyone!"
They all raised their heads to the sky as Lazarus appeared out of thin air, with Christopher and Leyla on his head.
SWHOOSH!
The golden dragon descended from the sky and landed between the two groups.
"Master!" the Beast Kings and the other beasts yelled in unison.
"WHAT?!!!" Electra and Alex were horrified.
"Christopher... is Christopher our former Boss?!" Alex asked in shock.
"Darkness said he entered the body of another... now everything makes sense! Christopher was a useless young man who was scared of beasts, then all of a sudden, he woke up with strength." Electra looked at Grim, Lucas, and Lazarus. "Do you think those Beasts are..."
Alex instantly understood her meaning. "Let's go!"
"What?!" Electra raised an eyebrow.
"Let's go and ask for forgiveness. I know he won't forgive us, but we should try!" Alex said.
Electra stared at Christopher, then at the Beast Kings and the other beasts, and finally at Advika. "No... I can't," she shook her head, her eyes welling up with tears. "I will back down from my seat and disappear from Cordelia. It will be better if I never see him again." Electra muttered, and without waiting for Alex's response, she turned and flew away, wiping her tears.
Alex stared at her for a few seconds, then turned to Christopher. After a moment of thought, he took out his phone and sent a message, then threw the phone on the ground and went his own way.
"Christopher," the Fire Goddess called out in a calm tone.
"I see you want to talk," Christopher said, walking toward her. "Last time, you wanted my head," he added.
"Last time, I was corrupted by evil," the Fire Goddess admitted, her gaze sweeping over everyone present. "I have a favor to ask you," she said, staring at Christopher.
"As long as I can have Advika back, I accept," Christopher said with a flat expression.
"Good... very good," she nodded with satisfaction. "Burn me with your Primordial Flame."
"What??" Christopher was stunned. Even Tiamat, who was listening, was dumbfounded.
"Look here... I can control all flames, but the Primordial Flames are out of my reach. If I can get physical with one, I can copy it and pass it on to my successor," she explained.
"I don't think you can copy it," Christopher countered.
The Fire Goddess smiled. "We can only find out after we try, right?"
Christopher thought about her words and looked at his group. "Stand back."
The stunned Leyla, who was still recovering from the shock that Christopher was the Beast Kings' master, blinked and leaped back a few meters, followed by the five Beast Kings.
Christopher looked at Lucas, Lazarus, Grim, Death, and Reaper, who stood behind him, ready to act. He nodded at his beasts and turned to the Fire Goddess.
"Okay... I will do it."