Entering the old mansion, all the items in the castle were still quietly lined up, and the lock of one of the floor-to-ceiling windows was broken and could not be closed, so the wind and rain were blowing, and no one cleaned it, so that a thick layer of dust accumulated.

"Too much ash, ahem......" Koichiro closed the open floor-to-ceiling window.

At this time, it was not yet evening, and it was only afternoon, and with the dim light, I could still walk around the old mansion at will.

Crystal candelabras, ornate baroque decorations, and elaborate frescoes depicting all the gods of Cruthus mythology, or the pomp and circumstance of the coronation of nobles, or some glorious deeds of the family.

As if he had returned to his own home, Koichiro looked around the family castle of the original owner, Ernest Hollerwallens, and knew from those exquisite oil paintings and the diary of the original owner that it had been nearly eight months since the coup d'état initiated by the Campbell family and Silides, and the parents of the original owner should have died a year and a half ago, and the previous "self" was finally beheaded after nearly half a year of hard resistance with the revolutionary army.

'It's a pity that time has changed', Koichiro said with some regret.

But now, he was more curious about why Silides didn't destroy the old mansion on the Dragon's Back Snow Mountain, but only the castle in Mondstadt.

'Is it because of the underground sealing array?' ’

Koichiro thought of the deeds of Silides by selling his soul to the demons, 'Is there a place under the ground where the dragons are afraid?' ’

Sakamoto Koichiro wanted to go directly to find the eye in the old mansion, so he had to take back the prophecy crystal to see if he would find a clue, but the prophecy crystal was being used as a gem and was clenched in the claws of the black owl.

At this time, taking the opportunity to look around, Hangichiro quietly locked the door of the old mansion to ensure that the black dragon would not be able to get out later, and he had already remembered another escape route in the prophecy.

'It seems that the Sealing Circle will only be triggered at a certain time. ’

"If the magic circle does exist in the old mansion, the power of the owl here should be weakened. ’

Xiao put on a stinky face, lying on a European-style rocking chair and swaying irritably, "Lone Cai will not be controlled by a mere human, but he just doesn't want this shameful contract." ”

The owl's words are harsh, but the behavior of sitting in a rocking chair is funny, 'Why is this European-style rocking chair so fun?' ’

Kuichiro pondered for a long time, and there was no sign of the Blood Oath members rushing to the rescue outside, and glanced at the prophecy crystal, which showed a red and white luster at this time, "Since that's the case, then take a gamble, there is a fifty percent chance of survival." ’

Hangichiro walked into the owl and said, "I have no intention of becoming your master."

Subsequently, Koichiro will make a contract to protect Love, but Love is a dying person and cannot be revived due to the lack of soul fragments, so the current unresolved matter of the slave contract is openly announced.

"Hmph, it's an unforgivable sin for human beings to make up such a story to deceive orphans!" After hearing this, the owl became angry, and recklessly kicked the delicate European-style carved rocking chair away to vent his anger.

"Roar-" The owl wanted to change back into the form of a black dragon, and the form of the black dragon was enough to burst the castle of the human tofu scum project in his eyes.

————————————

After hearing the roar of the black dragon, there was another person in the castle besides Koichiro and Xiao.

She heard the movement upstairs and looked up from the book she was holding in her hand, "Huh? Is this what happened? ”

After the abyss black dragon owl roared, it was still in human form, but it was stronger than humans, because the underground demon array was already quietly working, and it was precisely because of the mysterious man's use of the power of the Vision that any monster that entered the old mansion of Holler Wallens would be mostly suppressed.

'Damn humans have taken Lone into the place where Stormterror was sealed!' Remembering the castle that Koichiro had pretended to offer, he was angry that he had been calculated for his arrogance and recklessness.

Seeing the opportunity, Koichiro snatched the prophecy crystal, and quickly silently said in his heart, "Use the Vision of God as the source to open the eye that seals the black dragon." ’

However, Koichiro is not currently a person who has been approved by the Vision of God, and he can't use the power of the Vision of God, how can he open the magic array like Wendy, the god of wind, using the magic array to seal the Wind Demon Dragon, and there is no change at all around him at this time, let alone sealing.

The Abyssal Black Dragon Owl gritted its teeth and chased after it.

In desperation, "I can only go to the underground library first, maybe there will be an answer", Koichiro had never been to the castle of the Holler Wallens family, but at this time, a clear route appeared in his mind.

Hanichiro jumped onto the castle's staircase handrail and slid to the basement floor faster with the handrail, instead of choosing the way to take the stairs, the owl swooped up from behind, and Hanichiro flashed to the side with agility and slapped the owl's back coldly from behind.

Just as Koichiro was about to push open the thick door of the Ancient Books Collection......

The 10,000-year-old black dragon of the Fallen Shadow Underworld, even if it is suppressed by the Sealing Demon Array, is not comparable to the strength of human beings.

At this time, the owl fell down the stairs and rose into the air instead, and although it was in human form, it used "winging" to form black wings behind it.

The target was aimed at Koichiro.

“！ It's exactly the same as Love'......" Koichiro saw the same black wings as Love's on the back of the owl.

Is it true that after the slave contract, the abilities of the master and the slave are assimilated? ’

I don't have time to think about it right now!

Seeing this, Koichiro took down the mural in the corner as a cover, "No matter what happens to the three, seven, twenty-one, the furnishings in the castle are indeed very luxurious." ’

The black wings turn into sharp spikes, which not only allow the owl to fly in the air, but also use its feathers to shoot enemies.

"It's useless, the feather of the god is a tracking skill that hits every shot, you can't escape, and the human race will obediently surrender to the feet of Lone", the wings behind the owl are more concentrated due to the accumulation of power, and the spikes are more concentrated, and they are not a mural for decoration that can be avoided at all.

At the last moment......

"Mostima's servant, is this going to break his master's heart?" With a lazy, gentle voice speaking unfazed words, a man wearing a purple mage hat and a long purple skirt slowly pushed open the door.

Hearing this, the owl immediately restrained his irritable habits, and at the same time retracted the black wings behind his back, landed on the ground, and knelt down on one knee in the direction of the gentle female voice.

"Ka-"

"Crunch—" The thick golden door of the ancient book collection is slowly opening.

"First time we met, I'm Lisa, the administrator of the Divine Realm Library, since we're all here, why don't you come and chat with my sister first."