Sora and Sero are known as the twin dragon. This is because during the fight the two of them will cover each other weaknesses. Both of them have a master's in combat and magic, but just in terms of mind, Sora is more intelligent while in physical Sero is strongest. In the fight, Sora will analyze and find the weakness of their enemy. While Sero will launch an attack and support Sora until he finished the analysis. That why they never lost in a fight.

Sora and Sero were fighting the troll boss side by side during their sister's rampage. Both of them are using the sword that they borrow from the bar owner before, while the troll boss is using the spear that he collected from the ground. Sero was attacked the troll boss from the left sight while Sora is attacked from the right sight. However, all the attack from them was blocked by the troll boss. Then the troll boss swings his spear that he used to block and make Sora and Sero is thrown away from him.

“Tch… his big body is the biggest problem. We cannot move him from his position with our small body.” Complain Sora.

“Then how about we used boot magic to increase our speed.” Sero giving an idea.

“Yeah… let try that.”

“Accelerate.” Both of them begin to use some speed magic. Suddenly, their body becomes light as a feather and their movement becomes even faster than before. They attack the troll boss with the same plan but with a faster movement. Because of the faster attack from Sora and Sero, not all of the attacks can be blocked. Half of the attack was hit the troll boss's body and leaving a scratch. The troll boss was kneeling down due to a lot of damage he was taken.

“Yosh… we can do it.” Said Sero with confidence and while trying to cut the troll boss's head with his sword. However, before he can do it the troll boss stand up again and started to roar.

Rawl!

The roar is so high that makes the two of them had to close their ears with both of their hands.

“What a strong roar?” Said Sero.

Because of that roar, the two of them lost their hearing for a few minutes. Looking to the two of them losing their focus, the troll boss taken this opportunity to attack Sero. Sero quickly blocks that attack but because of the difference between their strength, he was flying back.

“Serooo…” shout Sora while turning his head.

“Now it’s your turn.” said troll boss with a smile.

Then the troll boss tried to attack Sora by swinging his spear. However, Sora managed to dodge that attack by jumping in the mid-air. He had to jump to the mid-air because that the only choice he had. If he tried to block the troll boss's attack then he will be sent flying just like Sero.

“Hahaha… idiot, with you in the mid-air, you cannot move freely. Now died.” While lifting his spear toward Sora's body.

“Shit… I cannot control my falling movement.” Sora realizes his mistake. In the mid-air, he cannot move freely and Its looks like he will fall into the troll boss spear that pointed toward him. "It is the end for me." He told himself.

But out of nowhere, Sero comeback from the falling and quickly cuts the troll boss's right legs. Because of the loss of his right legs the troll boss lost his balance and fell to the ground with his face facing the sky.

“Damm it.” Said him tried to get up.

“Nice one Sero.” Then, this change was taken by Sora to use his falling momentum and give the finishing blow to the troll boss's head.

Splat!

Sora's sword stabbed the Troll boss's head and make a blood gushed out through his head. Finally, the troll boss meets his dead there.

After that Sora removes his sword from the troll boss's head and splashes the blood to the ground. “What a strong opponent? Thank to you Sero. If you don’t come and cut his legs before, I think I will be dead there.”

“No… it’s not a big problem.” Reply Sero. Then, Sero starts kneeling with blood coming out from his head. It looks like he has taken a lot of damage from this fight.

“Sero, are you alright?” Sora worried when he looked at Sero's head covered with blood.

“Yeah… it only a small scratch. Finally, we successfully killed his monster.” While sweeping the blood at his head. “Ouch… This blood must come from the falling because of the troll boss attack before.” Sero said to himself.

“So, are we done here?” Ask Sero while swapping his blood.

“No... we still not finish yet.” Said Sora with a serious face. “We still need to stop our sister’s rampage before she will destroy all of our forests.” while pointing his sword at Aoi's place.

***

“So, what kind of power is this? It very strong like it will destroy us all.” Ask Sero to Sora because Sora is the one with full of knowledge.

“Listen Sero I think it about time you know.” With a serious tone. “As an elf, they have three kinds of power within them. First is the base power. The base power is the power contained in every single elf in themselves. This power will give us the ability to use any magic such as transform, paralysis, illusion, speed, and more. Every elf on this planet can achieve this form.” Explain Sora

“The second form is the Moon Night. Only the one that trusted by the moon will obtain this power. This form will give you the power-up in any kind of magic and increase your combat ability. This form is so strong that the rumor said anyone that achieves this form can face the entire army by themselves. Only 1 out of the 100 elves can reach this level and all of them that have makes it has famous names in our forest. They are all the 7 guardians.” Continue him more. Then he silent for a while to give time for Sero to process the information.

“So, you said that we have to stop this Moon Night power of our sister’s”. Sero tried to guess.

“No, that is not the Moon Night form.” while shaking his head.

“What? So, are you want to say that this is even greater power?” with his eyes wide open because of shock.

“Yes. That is not the Moon Night power but even greater power… The power of the third form, the Nightwalker. Nightwalker is the strongest form of an elf. Whoever achieved this form will grant unlimited magic power that they can even imagine. In 1000 years only 1 elf had successfully achieved this level and the last elf that used this power has destroyed one nation by himself. Not only that, they also rumor said that there are no one ever had successfully able to fully control this power.”

Sero was silent after hearing Sora's explanation. He never knows that her sister has that kind of power.

“So, what the requirement to achieve that form.” After a long silence.

“This form will be unlocked when the elf heart fell into the darkness. Their feeling of losing their loved one will turn their emotion into some kind of power. The feeling of sadness, frustration, anger and more negative emotion will make their heart turned black and awaken the strong power to erase everything.”

Then sora continues. “Do you know why our sister’s hair has changed to white?” While pointing at Aoi's body. Sero shook his head. “This is because of the uncontrolled unlimited magic that she carries even her body cannot take it. If continue like this, her body will be destroyed and she will die.”

Sero gritting his teeth. Then he said, “Is that anything we can do to stop her?”

“Two years ago, she has been like that during our mother's death and destroyed all the entire goblins in the Elf Forest. The one that stops her rampage before is Miya, one of the 7 guardians right now. Even so, she had a struggle time before successfully stopping her.”

“So, you want to say that only one who achieves the Moon Night form only can stop her right?” Sero tried to guess Sora's word. Sora was silent and nodded his head. “… but she is my sister’s and I will do anything to save her.” Add Sero more with confidence. In his mind, he was thinking to fight his sister alone to save her.

Then, Sora holds Sero's shoulder and said “Wait… she also my sister’s. If they are no one as strong as guardians here then we, the twin dragon will take a fully action to stop her.”

The two of them seem very confident. This is because they believe in each other strength. They don’t get the tittle as a twin dragon easily but with acknowledgement from many people. That why even facing the guardians, they are not scared.

***

Sora and Sero are ready to face Aoi. They knew that if they don't stop Aoi eventually her body will be destroyed and she will die. So, before it’s too late they have to take an action faster. Both of them are walking toward Aoi place. However before, they reach Aoi place a sudden voice coming from their back.

"Ano...I can help you." In their back they are the young women with short black hair is standing behind right them. Her body is about their sister and she caring a sword with her. When looking carefully she is one of the hostages that Sora saved before.

"Who are you?" Ask Sero.

"My name is Mei Nakamura, and I am the captain of the group of hostages that you save before. I was known as 1 of the 12 Holy Knights in my place. To return the kindness in saving us just now, I can help you two to stop your rampage sister." Said the girl while introducing her to these two young boys.

"I'm very appreciate that but… I cannot let the stranger to be involved in our problems." Sora tries to refuse Mei's help. "Moreover, this power is something that you never face before. Will you risk your life for something like this?"

Sora doesn’t want any stranger to involve in their problems. Moreover, this problem is causes by him, so it was his responsibility to solved it. He doesn’t want anyone to lose their life because of him.

"I'm maybe the weakest in 12 Holy Knights but I am not someone that will let the person who saves me dies before I reply his kindness. Moreover, it will be easy for us to stop her if we working together." Still insists.

"Alright, if you insist. But we cannot graduate your safety and please don’t use any kind of attack that will hurt or kill her because I just want her to come back her sense."

“Ok, understand.” Reply Mei

Then three of them continue walking toward Aoi place. After making sure they are close enough Sero draws his sword and said, “Listen, I will create an opening you two, while both of you attack her with your strongest attack.” Lift his sword to begin the attack. But before he attacked, he was stopped by Sora.

“Wait… I refuse. I am the one that will create the opening while you two attack.” while drawing his sword.

“No, this job is dangerous. I will, moreover I am strongest than you in magic and combat.” Also refuse Sora decision.

“No, I will. After all, you still hurt from the last battle with troll boss before.”

“No, I will…”

“No, I will…”

“No, I will…”

“No, I will…”

Mei watching them from the back is clapping her head. Even the two of them is strong but inside them, they still a kid.

“Such a pain.” Mei said to herself. “Listen I the one will create the opening while you two launch your best combination attack.” While drawing her black sword that looks like katana that she slips around her waist and advanced toward Aoi place leaving this two behind.

Sora and Sero looking at each other with confusion face.

***

Cling!

Mei's attack was blocked by Aoi using her sword. Mei tried to swings her sword and attack Aoi body. However, all her attack is not even scratch or damage Aoi. The wind around her body is being like a shield that protect her. Then Mei using a little bit of her strength to push Aoi back. However, Aoi is not moving at all. Her body stays like a stone.

Aoi in a state of unconsciousness lift her other hand and using wind magic to throw Mei. Mei realizes an incoming from Aoi and quickly duck. While duck she tried to attack the lower half of Aoi's body but before her sword reaches, she was sent flying by Aoi’s wind magic.

“Now” shout Mei while flying.

“I, who stand in the full light of the heavens,

command thee, who opens the gates of hell and to destroy my enemy

Come forth, light arrow!”-Sora

“I, who stand in the night of the hell,

command thee, who opens the gates of heaven and to destroy my enemy

Come forth, dark arrow!”-Sero

From afar Sora and Sero have finished their spell of light and dark magic and launch that attack towards Aoi simultaneously.

Boom!

Their attack hit Aoi's body and make an explosion. Their combination magic is very strong until making a mist from the ground is up and affects the surrounding area.

“Did it work?” Said Mei after gets up from her fall place. She was thrown away about 10 meters from her place before. After the mist disappears, Aoi is looking fine without any scratch from that attack. “You got to be kidding me. That magic is not even damaging her.” Then she feels hurt from her head. When she touched her head with her hand, the blood is flowing out from her head to her hand. The wound is come from her fall before when her head hitting the ground.

“Are you alright?” Ask Sora and Sero simultaneously while running toward her.

“Yeah… It just a little scratch, but that combination magic is not even damaged her.” Reply Mei

“We need a more powerful attack.” Said Sora while thinking.

From afar look like Aoi gonna launch another attack. She lifts her sword and tried to swing it like before when she destroyed half of the troll base.

“This is bad, all of you duck…” shout Sero giving a warning to Mei and his brother.

Swoosh!

Then a strong swing attack comes from Aoi that make all the thing around her is flying. However, those attack is successful be dodge by three of them. This is because of the Sero shout that makes them had time to act. All three of them tried to stand up.

“This is bad. Her power is truly amazing. I don’t think we can make it.” Sero realized that his sister's power is beyond what he imagined.

“Yeah… If you not warning before I think all of us will get slashed by her sword attack.” Add Sora.

“So, what are we going to do now? Even the three of us working together, we still cannot even scratch her.” Sero looks like he has given up.

Then Mei comes from behind the two of them and lifts her sword about her waist. “Looks like I don’t have any choice. I will use that power again. I still not recover from the last battle but maybe this is the only chance that we have.” While chanting some strange magic spell on her sword.

“???” Sora and Sero