Yuri was a really threatening foe, not only he was ruthless but power hungry as well, Yuya was in a desperate situation and only a miracle could save him.
"Why bother to try winning when you can't, Yuya? I'm the best duelist around, and soon I'll have your power too, becoming literally invincibile!" Yuri said while laughing maniacally.
"I can't let that happen, Z-Arc won't return... it's my responsibility!" Yuya said while raising on his feet after an attack from Yuri's Starving Venom Fusion Dragon.
"Yugo is also in me now, and we are only waiting for you, and to demonstate that, I call forth Clear Wing Synchro Dragon!" Yuri chanted summoning Yugo's boss monster.
"That's really Yugo's Clear Wing..." Celina remember that monster very well from her duel with Yugo.
"What happened to Yugo, you monster!" Rin said as tears started to stream down her face.
"As I said, I absorbed his power, and I'm going to get Yuya's too. I know that also Yuto's power resides there, we are the same after all." Yuri laughed.
"I'm not the same as you at all, I don't have pleasure in making others suffer" Yuya looked at his opponent with a determined gaze.
"My turn now, I use my Pendulum scale to summon my Odd Eyes Pendulum Dragon back to the field! And now with my perfomapal level 4 monster I build the overlay network for an XYZ summon, Dark Rebellion XYZ Dragon is here too!" Yuya said as a strong pain came to his head.
"I can't control him Yuto, his power is slowly taking over..." Yuya spoke to Yuto.
"Me neither..." Yuto answered before his eyes started glowing.
"We must reunite into one" Yuto totally lost control.
"We will be one again!" Yuri said as his eyes glowed.
"Like in the beginning" Yugo's spirit chanted beside Yuri, he lost control too.
"The 4 Dragons together are probably the reason" Declan mused.
"Yuya!" Yuzu shouted worried.
"Son..." Yusho was in the same situation.
"I know you can overcome it! Be strong as you always had Yuya!" Celina encouraged refusing to lose hope.
"Thanks guys... I have to resist..." Yuya's eyes were starting to glow as well, but some of his will was still there thanks to who supported him.
Yuya managed, even in his an enraged state to continue his duel, and we come to the point where Odd Eyes Raging Dragon was on the field.
"This isn't possible, I never lose" For the first time Yuri lost his cool.
"Accept it, you lost Yuri, I attack both your Starving Venom and Clear Wing with Raging Dragon!" Yuya commanded as the lethal Dragon unleashed his fury on Yuri, his LP dropping to 0 and his body landed on his back
"Good job Yuya" Declan complimented.
"I knew he could do it!" Zuzu said with a little smile.
But then they noticed that he was slowly walking toward Yuri's body, with his face looking at the floor, no emotion visible.
Celina knew there was something wrong and tried to intervene.
"What are you doing, Yuya?" Celina grabbed his shoulder.
"Only taking back what it is mine, nothing more" Yuya said as the demonic voice came back even stronger.
He shouted in rage as a dark aura enveloped him and Yuri, Celina was pushed back from the shockwave.
"The darkness is taking over... I can feel it" Celina thought nearly shaking.
Some moments later the darkness dissipated and not only Yuri was nowhere to be seen but Yuya looked completely different, like a more muscular and inhuman version of himself.
"I'm finally here again, the supreme King Z-Arc is back!" Z-Arc announced to everyone in the room.
"Yuya no..." Celina said dropping on her knees.
"This is a catastrophe..." Leo said as he watchet powerless.
"I guess I have to thank you... Leo Akaba, thanks to your plan, my 4 reincarnations finally got reunited. I only had to adjust the little detail about your reactor to not get back that nuisance of a girl named Rei as well." Z-Arc said as he admired his newfound body.
"So it was all your machination... You used not only my father, but everyone of us?" Declan asked.
"That's right, now that your plan to get your daughter back failed, noone will be able to stop me!" Z-Arc laughed as a new shockwave started spreading destruction everywhere.
"But it's a shame not having my original dimension back, so with my new powers I'll force them together once more to have my personal stage for my absolute victory!" Z-Arc said as the entire island started floating, the sky became darker, and dimensional portal come opening everywhere.
"I can see Heartland City in that portal..." Lulu noticed shocked.
"New Domino City is in that other one..." Rin commented in shock too.
"I can see my city in that one too..." Zuzu also was paralysed in fright.
"Is he really fusing the 4 dimension? How is that even possible..." Celina said totally astounded.
"Z-Arc can literally do anything, and now the only person who could stand up to him, my daughter Rei is no longer here, the world is lost forever..." Leo sais as he closed his eyes.
Many duelist tried invain to stand up to the evil god, but he quickly defeated all of them using his own version of the 4 Dragons.
"Clear Wing..."
"Dark Rebellion..."
"Starving Venom..."
"And Odd Eyes..."
Celina, Zuzu, Rin and Lulu all said in unison.
Aster, Sora, Kite, Shay, Crow, Sylvio, Jack and Gong all fought valiantly, managing only to do little damage to the mighty tyrant.
Even Leo and Declan tried but it was invain.
"Not everything is lost yet!" A sudden voice spoke in their mind which only Leo knew.
A golden spirit descended and entered Riley's body to speak to them personally.
"Riley!" Declan was worried about his brother.
"Don't worry, I'm only using the boy as a vessel for my spirit, it won't hurt him" Rei spoke from Riley's body.
"Rei? How can this be?" Leo couldn't believe he was hearing his long lost daughter.
"I would have lots of thing to say, father, but it's not the right moment, we have a dimensional crisis to stop" Rei spoked as she now directed her words to the four bracialet girls.
"You four are my reincarnations right? I can feel it from your bracialets" Rei asked first.
"What does the bracialets have to do with this?" Celina asked uncertain.
"Those bracialets were a measure that was meant to keep Z-Arc's reincarnation separated"
Rei explained.
"I ruined everything my daughter sacrificed herself for..." Leo thought in shame.
"I once had all four, each representing a nature element. My father has already told you about the 4 secret cards he created to defeat Z-Arc right? Truth is hey are kept safe in the bracialets themeselves." Rei continued her explanation.
"The cards are hidden in the bracialets?" Zuzu was rightfully confused.
"Please, I know it's a lot to take in but I need you to believe in me, unite your arms pointing toward the sky, and you'll see for yourself" Rei asked gently.
"We have nothing to lose, if there's even a single chance to save Yuya, I'll take it!" Celina said with determination raising her arm.
"Same here Celina" Zuzu copied her.
"Yuto is in danger too, I'll help." Lulu also did the same.
"Yugo too, I'm in" Rin said at last.
"You really are 4 brave and kind girls, I'm proud of you" Rei said as blinding light was released from the bracialets in contact.
When it disappeared each girl had a card adorned with a golden aura in their hand instead of their jewels.
" En Winds" Rin started
"En Birds" Lulu resumed.
"En Flowers" Zuzu continued.
"En Moon" Celina ended.
"Those 4 cards incarnate the power of our world, En Moon has the power and the balance of the cosmos, En Winds possess the power of the storms and gales, En birds has the power of all living creatures, and En Flowers represents Mother Nature herself" Rei explained to all the 4 girls.
"You now have the power to stop him... you must believe in yourselves and your decks, and in the end you will be able to save the people you love the most" Rei chanted as her power slowly started to dissipate.
"Yuya... I'll do anything I can to take you back" Celina thought with a solemn look.
"I don't have much time left, but I trust you four, I believe you will able to save our world" Rei said as she gave a final look to her dad on the side.
"Forgive me Rei, only now I understood that I was insulting your sacrifice by trying to erase those girls to have you back! This is all my fault!" Leo said as he dropped on his knees.
"I know you did it because you loved me but it was still wrong, you'll make up for it when the time is right, treasure them from now on, love you dad" Rei said as her spirit finally separated from Riley and Declan caught him before he fell.
"I will" Leo though looking at the girls.
"Looks like it's our destiny to put an end to this, all ready?" Celina said leading the group.
"Yes!" The other three shouted.
"Z-ARC, we all challenge you to a duel!" The four shouted ready for everything to save their respective friend.
"If you really want to be demolished, and since you are all Rei's reincarnation it will be my pleasure!" Z-Arc said as he readied himself.
The final act was now in motion.