Su Tingbai's plan is divided into four steps.

The first step was to familiarize Feng Cheng's body with the aura of her demon pill as soon as possible, and this step had already been completed in the previous subtle transformation. The second step is to let the breath of the two of them blend in subtleties, and the most direct way is to take the condensed aura in the demon pill and enter his body, that is, the cup of water that Su Tingbai poured for Feng Cheng. The key to the third step is on Su Tingbai's body, she has to get used to the demon pill leaving her body for a long time in the shortest possible time, because the time required for the last step to fuse is very long, and the demon pill will always be in a state of leaving the body during that period. She had never cultivated a similar auxiliary technique before, and now she suddenly picked up these basic knowledge and learned it, and it was false to say that it was not difficult.

From half an hour on the first day to more than two hours at most after three days, Su Tingbai would practice quietly whenever he was free, and it just so happened that Feng Cheng was busy these days, and the two of them were indoors and outdoors, which facilitated her movement and reduced the risk of being discovered.

Time slipped away little by little, and finally it was June 25.

*

Just after midnight on the 25th, the mobile phone resting on the bedside table suddenly lit up, and the screen flashed with a photo of the seal.

Su Tingbai, who was still asleep a second ago, opened his eyes suddenly, his eyes were clear, and he could faintly see a little nervousness.

She turned her head to look at Feng Cheng, who was still sleeping beside her, and with a very light movement, she picked up his arm around her waist and slowly moved away.

Thinking of the scab spells he had given Feng Cheng before going to bed, Su Tingbai stopped when he got up, and approached him with some anxiety to carefully observe his state.

The breathing is steady and long, and the heart beats at an even rate.

Thinking of something, she leaned closer to his ear and whispered his name, "Feng Cheng... Inheritance, wake up ......"

Feng Cheng didn't react, he did sleep to death.

Su Tingbai was relieved at this time, got out of bed and put on his nightgown, and then opened the door lightly and went to the first floor.

In order not to disturb the sleeping of the two little guys lying on her side, Su Tingbai deliberately did not turn on the light, but her night vision was good, so she didn't need to turn on the light, so she went straight to the direction of the storage cabinet.

In order to avoid being contaminated with her own aura and affecting the casting of spells, all the props she will use this time are newly bought, and naturally they can't be put into her sleeves, but they can't be discovered by Feng Cheng to arouse his suspicions, so Su Tingbai found the safest and safest place to hide things.

The storage cabinet on the first floor has always been filled with snacks from her and the first year of junior high school, the one on the left is hers, and the one on the right is the first one. Feng Cheng would occasionally open her cabinet to get some snacks, but the cabinet in the first year of junior high school was something that everyone could use only him by default, so Su Tingbai hid all the props he wanted to use in his cabinet.

"Yellow Fu, cinnabar, brush, altar..."Su Tingbai muttered as he took them out one by one, and only closed the cabinet door again after making sure that it was correct, but when he turned around, he was almost frightened and jumped on the spot.

Fifteen didn't know when she appeared behind her silently, and she didn't know how long she had been watching here, her dark eyes were staring straight at Su Tingbai, and she had a burst of hair on her back, which was already empty.

"Fifteen?!" Su Tingbai lowered his voice and asked tentatively, "Why haven't you slept yet?"

Fifteen glanced at the large pile of things she was holding in her arms, did not answer her words, only silently reached out and took out something from the pocket of her pajamas, and then spread out her palms in front of Su Tingbai.

It was a triangular scale, only half the size of his palm, black as ink, with a sharp cold light shining at the edges, which looked particularly mysterious and strange in the night when he couldn't reach his fingers.

As soon as this thing appeared in front of Su Tingbai's eyes, she opened her mouth slightly in surprise.

“... Heart Scales?" She subconsciously frowned, and looked into Fifteen's eyes in confusion, "...... are you?"

Fifteen handed her hand in her direction again, and her voice was unwavering, "This is my mother's heart scales, I hope I can help you." ”

His mother's heart scales......

Hearing his answer, Su Tingbai was slightly stunned.

The formation she was going to set up later required a lot of spiritual power, but the separation of the demon pill from her body would inevitably affect the effect of her spirit gathering and reduce the probability of success.

And this black dragon's heart scale has the most unique ability between heaven and earth, it can not only protect the black dragon's dantian, so that it can avoid being secretly injured during the battle, but also set up an altar to gather the aura, it can be said that as long as there is it, the aura caused by the demon pill leaving the body is not a thing.

Su Tingbai hadn't beaten the idea of fifteen heart scales before, but first, it was not easy to get the heart scales, and secondly, it was said that most of the dragons were very stingy, and things like heart scales would definitely not be easily lent to others, Su Tingbai was afraid that he would be embarrassed after opening his mouth rashly, so he didn't mention it in front of him, but he didn't want fifteen to take the initiative to give her his mother's heart scales.

What surprised her even more was that Fifteen had actually guessed her purpose......

If Su listened to Bai Yuan to see the aggrieved idea that Fifteen was actually occupied by a pig of unknown origin in advance with his home-raised Shuiling cabbage, then the current Fifteen is a generous and peerless dragon in her eyes.

Su Tingbai looked at the beautiful scales in his palm, hesitated for a while, and finally refused: "Since it is your mother's heart protection scale, then this must be of great significance to you, in case I accidentally break it or something happens......"

Fifteen shook her head to interrupt her and stuffed it into the small jar in her arms, with a serious expression, "If the Heart Protector Scale can't play its original value, then it will always be a dead thing." I'm sure my mother will want you to use it, too. ”

Su was stunned when he heard this, lowered his eyes and looked at this priceless scale, and only spoke in a low voice after a while.

"Your mother... Who the hell is it?"

Fifteen Wu walked up to the stairs, turned his head when he heard the words, looked at her and was silent for a moment, and threw down an unclear word.

"Soon, you'll find out. ”