The sky turned dark after the black lightning came.

Yuga immediately stood up with his body bowed and said "Hey, why are you still bowing down? Do you have a god to worship?"

"I know, I'm going to die, I'm going to die! Nice to meet you!" Erga said while prostrating and crying because he still didn't know what was happening in front of him.

"Come on, stand up and see what happens!"

Erga raised his head and was surprised to see that Grera was no longer there. He only saw the destroyed ground with smoke accompanied by a black aura.

Erga stood up and asked, "What happened? Where is that terrible human?"

Yuga turned to Erga and said, "He was not human, he was an eltera creature named Grera. Now he is dead!"

"How could he die?"

"Grera died because he was hit by Eirin Kokutsa's technique. No one could escape the attack. Eirin's attack locks on its target and will continue to pursue even if it has to go to the afterlife."

Erga fell silent after hearing Yuga's explanation.

"Does your world have such power?"

"Um... Actually, I have never seen any power in my previous life. According to belief, King Arata had greater power than that. I heard this story from my mother."

"Who is King Arata?"

"I don't know. In my opinion, he is an entity that has never been matched and has never been seen."

Yuga sighed then said, "A Seyga who has seyga techniques must have a soul and a body. Many conditions must be met to gain eltera power. If King Arata is never challenged, then he is not a human, but a Grera Seigard who has exceeded his limits."

"I'm still not sure. But, what are eltera, Seyga, Grera and seyga techniques?"

Yuga looked up to the sky and said, "Okay, I will explain everything, so that you can know this world."

When the sky brightened again, Yuga began to tell everything.

In this world there is a natural power that can be taken through the soul, this power is called eltera. Humans who gain eltera powers are called Seyga. The seyga technique is part of the use of eltera power by its user, Seyga.

Seyga is divided into three different parts; Seyga Sein, Seyga Geni, and Seyga Gringer.

Seyga Sein is a human who acquired eltera powers from birth.

Seyga Geni are humans who gain eltera powers through meditation and practice.

Seyga Gringer is a human who gained eltera powers by extracting Grera's soul.

Please note, Grera is a creature of eltera that can increase its strength and abilities by killing humans or killing other Grera. Grera has a strange and scary figure.

Grera is divided into three parts; Grera Nin, Grera Shin and Grera Seigard.

Grera Nin are creatures that have no thoughts and move aimlessly.

Grera Shin is a creature that has intelligence and can speak, but its form is still the same as its original form. Grera Shin is stronger than Grera Nin.

Grera Seigard is a creature that evolved into a human. This Grera is the strongest level of the other Grera. Has intelligence and a human-like appearance. However, it can be distinguished from its face which has markings.

When Yuga stopped talking, Erga asked with his head lowered, "Yuga, in my previous life there was no Grera, there was only a human who had a mark on his face called Derka. They got that power from King Arata, then there was a mark on the face. Are they called Grera or Seyga Gringer?"

Yuga turned to Erga and answered, "If humans are given power by God, then they are included in the Seyga Sein. Then... If there was no Grera, how could someone be Seyga Gringer."

Suddenly, Erga cried.

Yuga walked away saying, "I don't care about the pain you feel. But be aware, this world is very harsh and cruel. There is no place to cry for you."

Erga was surprised after hearing Yuga's words. He remembers his past. In the past, his grandfather had said the same thing. At that time, Erga cried because his mother was killed by Derka while she was looking for food.

"I was always in sadness and misery. Today, I still don't feel alive. This all still feels like a dream." Erga said while wiping his tears.

Erga smiled and nodded his head after hearing Yuga's words.

Suddenly a crow approached Yuga.

“What is that crow? Grera or animal?”  Erga asked.

"Arzion's crow. This crow can convey messages in detail. Starting from his voice to the content of the message from the person who sent it." Yuga answered while stretching out his left hand. Then the crow landed on his left arm.

The crow spoke in a woman-like voice, "Yuga, bring that creature to me. I'm in Merya with Lonea and Sin Meryan."

Yuga replied to the message to the crow Arzion by saying, "Sorry, my house has been destroyed. Grera Seigard, he is Lidra. Now, I am ready to leave. Thank you."

After Yuga finished speaking, the crow flew away and left at high speed.

Erga was very surprised when he saw that the crow could talk and could go very quickly. According to him, this made absolutely no sense.

"Yuga, who is Arzion?"

"Commander?"

"Yes. Now, my house is destroyed and I have no place to go home to. Let's go together!" Yuga said.

"Where are we going?"

“We should go to Eirin Kokutsa's residence.”

Erga followed Yuga's steps while saying to himself, "He always mentions the name Eirin Kokutsa. Who is she?"