Night White opened the box on the table, and there was a note in the box.

"It will give you great power, and you will be sucked by it for life. Remember that this power does not belong to you. Do not try to control it, or your soul will be imprisoned for eternity." Night White read out the contents on the note.

"Oh, the man in black armor is hiding something that doesn't belong to him! If I hadn't just stopped you, maybe what I said just now would have really happened to you. Please calm down, sister Mavis. Just leave this thing to me. If you act without permission, don't blame me."

Then Night White turned into the Blood Race and walked towards the bathroom.

"Maybe I should really calm down. But facing that black armor, I can't control my killing intent at all!"Mavis clenched her fist.

Mavis took the note and looked at it carefully, "The tone is like a warning from the previous owner of 'it'. So the person in the black armor may not be the murderer of my parents. He can only be considered the offspring. I must find out what exactly 'it' means. “It” was able to easily kill my parents. If someone mastered the power of “it”,my aunt may not be his match."

Although the note wrote"Do not try to control it", it may mean that the previous person in the black armor could not control it and therefore lost his life. It does not mean that this black armor owner cannot control it.

"Just now did Iris tell me to be calm and obedient, or else she would let my grandmother take me away? Oh no, it seems that Iris needs to be educated by me again."Mavis showed an unkind smile.

"Fortunately, you stopped your sister in time, otherwise she would have been killed by that man in black armor." Chaos' voice reappeared in Iris's mind.

It was also thanks to Chaos. If he hadn't been in time, Sister Mavis might have really died.

"Chaos, are you sure the lock is on that person in the black armor?" Iris inquired.

"It is indeed in that man in black armor. Look, a human was able to kill your mother's brother and sister-in-law with this part of power, so you can imagine how strong the lock is."

"Does it mean that there are other special powers in this lock?"

"Of course! But it's useless to tell you. After all, the lock is not in your hands."

Iris: "..."

"Taking the shower is really comfortable. Today I should be able to sleep comfortably." Iris stretched out and walked out from the bathroom.

"Iris, you seem to be threatening me just now?"Mavis looked at Iris and showed an unkind smile.

"Huh? What? Sister, you must be joking." Iris had a bad feeling, "It seems that you did not say so just now! You threaten me to be obedient, or you will let my grandmother take me away! Isn’t it a threat to me?"

"Should ... not ..." Before Iris could finish, Mavis grabbed Iris’s ear and entered the bedroom, roughly throwing Iris onto the bed.

"Now you’ve already a shower. You should be delicious! It just so happens that I didn't have dinner."

"Delicious? Dinner?"

When Mavis finished those words, Iris understood what Mavis meant gradually.

At this moment, Mavis' eyes turned scarlet and Iris was forced to shiver at the foot of the bed. It was obvious that Iris knew her sister's intention.

Mavis has one hand pushing Iris' hands above her head. Mavis' hand is so strong that Iris has no chance to resist.

Mavis said with a hint of playfulness: "Doing something wrong should be punished, especially threatening me. I hate this feeling."

Just when Iris wanted to beg for mercy, Mavis's other hand covered Iris's mouth, obviously knowing that Iris would beg for mercy.

Mavis stretched out her soft tongue and licked the neck of Iris, as if she was looking for the blood vessels in the neck. After finding the blood vessels, Mavis revealed her sharp fangs and stabbed into the neck of Iris.

A tingling sensation came, so that Iris shivered suddenly. Iris’s original white face became slightly red.

Iris had only ever been sucked by her mother's blood, and that pain was very intolerable. Mavis was like teasing the prey, which made Iris feel inexplicable scared.

Mavis' fangs pierced into the neck of Iris, and the blood was sucked by Mavis into her throat little by little and into her abdomen. Iris is very painful. She wants to resist, but the nerves of the brain does not have any instructions. Now Iris is just like a doll at the mercy of others. Gradually the vision in front of Iris was dim, but Iris saw that Mavis's sister's face had somehow become slightly red. Does it mean that blood-sucking could also make people feel shy?

After a long time, Mavis pulled out her sharp fangs, licked the blood stains on her mouth and said with satisfaction, "How satisfying!"

Mavis covered Iris with the quilt, and then walked towards the bathroom, muttering, "See if you dare to threaten me in the future!"

...

After the light rain, the air plummeted. Children on the streets paddled around stepping on the ice that had condensed from yesterday's rain, with happy smiles on their faces, making people feel warm. Of course, some children were being reprimanded by their parents, because their parents were worried about the safety of their children.

The grandparents and grandma set up stalls on the streets of the city. No matter how cold it is and how slippery the ground is, they still come out on time to set up their stalls.

"Hiss~Hiss~" The White Sun's cry rang out as it ran inside the two men's bedroom and kept rubbing its head against Mavis's face.

"Got it! Wash up and prepare food for you."

Mavis looked at Iris on the side and said to her, "Did I inhale too much blood, causing Iris to still be unconscious now."

"Hiss~" The White Sun on the side kept urging Mavis to prepare food for it quickly.

"Don't rush. I know."

Mavis then prepared the food for the White Sun, ate casually, and then went into the study to start studying magic.

In the afternoon, Iris felt that her body was weak to the extreme, and it would take two to three days to recover from this state.

"Damn Mavis, I am for your own good, but you sucked my blood. I must take down this revenge." Then Iris took out her a notebook, and wrote down these things.

"One day, I'm going to suck all your blood, so you can also experience this powerlessness."

Iris estimated that he could be unable to cultivate for two or three days. Now Iris had to recite the sword recipe, then Iris then closed her eyes.

Then a matchmaker wielding a long sword appeared in her mind. The matchmaker wielding a sword gave a soft feeling to Iris, making her feel that this sword art can not kill, more like for juggling. If you look at this sword art carefully, it contains a toughness.

When the matchmaker's demonstration was over, Iris opened her eyes, "Combining softness and toughness? It is full of great difficulty."

In fact, Iris is more incomprehensible, especially the duel of life and death. It is logical to fight with all your strength to kill each other until the other person dies. The force is especially important in the process of killing. If you use strong force, each attack will make the opponent difficult to fight; but if you use the weak force, you will certainly die.

Iris sighed. It is impossible for her ask the masters about this sword art. As long as Iris wants to ask about the sword recipe, she will be banned.

"What a disgusting prohibition."