As Sona and Adrien played chess, she told Adrien something very interesting, "two exorcists appeared in Kuoh today, they're both holy sword users."
"Oh, that's interesting, you informed Rias right? Her knight is a former victim of an experiment to create swordsmen who can wield Excalibur, just seeing a Holy sword could make him go crazy." Adrien said as he made a move.
Sona thought about Adrien's move for a second then said, "I'm surprised you know about it."
"Of course I do, I've visited their destroyed lab a few years ago"
"Why am I not surprised?"
Adrien smirked, "you made a mistake."
"I did?" Sona started searching for it, after a minute or so she sighed and resigned.
"I've never beaten you once!" Every time she played Adrien she lost and every time she became even more infatuated with him.
Adrien smiled. He had kind of known that Sona liked him. He would not say that he was in love with her, but he was somewhat attracted to her. Still, he never made a move because he did not want to.
"Do you know what these exorcists look like?" Adrien asked.
"From what I found out, both of them are girls. One has short blue hair that reaches her chin, with a green-dyed fringe on the right side. The other has long chestnut hair tied into twintails," Sona said.
When Adrien heard that he exploded into laughter, which only confused Sona even more.
"Huh, do you know them?" Sona seemed genuinely surprised.
Adrien nodded. "Sometimes fate is really funny."
--<>--<>--<>--<>--<>--<>--<>--<>--<>
After Sona left, Adrien sat on his sofa, deep in thought. After a while, a click echoed through the apartment and the entrance door opened. Saeko, Mahiru, and Celia had finished their devil work and returned. All three of them looked visibly tired. Celia immediately went to take a bath, while Mahiru and Saeko reported on their work and then headed to their apartment.
Just before Saeko closed the entrance door, she peeked her head back in and said, "Try to lay off your activities tonight. The walls are thin, and we need to sleep."
Click!
'She's cock-blocking now?'
Adrien sighed, he could do that for today, but then an idea came to his head.
"Two walls are better than one right?", he said as he joined Celia in her bath.
The next morning Adrien sat up from bed, Celia was still sleeping next to him, but this time she wasn't naked.
The school day passed uneventfully, in the evening Adrien sent them to do devil work for an hour only, after they returned they were greeted by Adrien in his training outfit and sunglasses.
"We're gonna go train!", he announced energetically.
"But it's mid-night for fuck sake!" Celia complained.
"Devils are stronger in the night anyway, go change into your training clothes."
All three of them complained under their breath as they changed their clothes.
Adrien decided to start training them early. He was expecting something big to happen in a few days. After all, Holy Sword wielders do not enter devil territory for no reason.
After everyone gathered in the living room, a magic circle flashed under them. They vanished from the room and appeared again in a forest covered in snow. The cold hit them immediately.
"H-huh, where are we?" Mahiru asked, looking around as she rubbed her arms.
"We're in a forest somewhere in Russia. You should've brought something warmer" Adrien said. He was wearing only a compression shirt and shorts, but he did not seem cold at all.
"Brrrrr... did we really have to come to such a cold place?" Saeko asked.
"Well, the closest city is like a hundred kilometers away, so I usually come here to train."
"You're crazy!" Celia said as trembled.
Adrien reached his hand toward them, and suddenly winter clothes for the girls appeared in his hands. "I brought these for you all. I'm so nice, and considerate right?"
Mahiru nodded, as she took a warm looking coat.
"Mahiru you shouldn't be praising him right now." Saeko said.
"Weren't you calling me master two days ago?"
"That was in the past. The me of today has seen the truth."
"Anyway, put these clothes on so I can start with the basics. Celia, I've already taught this to you, so I want you to practice pouring as much Demonic Energy as you can into each attack. I want to increase your power output." Celia nodded as she took a coat and went to practice on her own.
After Mahiru and Saeko warmed up a little, Adrien started, "Your body has many important parts. The two most important are your Energy Points and the Energy Lines that connect them. Your Demonic Energy stays inside these points, and when it wants to move from point to point, it goes through those energy lines."
"Saeko, you asked me before about demonic leakage. Because the body is not perfect—and trust me, not even the Gods are perfect—power leaks out through these Energy Points. And I mean all kinds of power, like Demonic Power, Holy Power, Life Force, and more. All of these powers leak from the Energy Points, and they recover the same way the rest of your body's energy does: by eating and sleeping."
"This leakage is like a double edged sword, it hides the supernatural part of you from the eyes of the human world, but at the same time it messes a lot with the control you have of your Demonic Energy. When you want to use a technique the demonic energy in you needs to travel to the point you're releasing it from."
"So because your power leaks, not all of the Demonic Energy you use actually reaches your attack. Some of it escapes on the way through the energy points. So if an attack needs 10 units of power for example, you may need to send 30 or 40 just to make it work properly. Any questions?"
Both of them shook their heads Simultaneously.
"Good. Now, there are two ways to use Demonic Power: the direct way and the indirect way. The indirect way is the one you will see most often. It works through magic circles and chants. Chants are used more by magicians because they do not have the same natural feel for power that supernatural beings do, so forget about that, it is a waste of time. Magic circles are far more efficient, but they have to be memorized first. Once you memorize one, you can picture it in your mind and it will form in front of the Energy Point you are releasing power from. What the magic circle does is guide the Demonic Power for you. So instead of controlling every movement yourself, you only need to pour in the amount of Demonic Power the attack needs, imagine the magic circle, and the power inside it will automatically be guided to the point where you cast it."
Saeko raised her hand then said, "you said to forget about chants but isn't it better to know both".
"Nah, chants basically do the same thing as magic circles, but there are two main differences. First, a chant does not just guide your power, it also decides which Energy Point the power is released from, which makes it much less versatile. Second, you are not Sukuna, and you do not have multiple mouths, so you can only use one chant at a time. With enough training, though, you can cast several magic circles at once."
Both of them nodded.
"Okay, lastly, there is the direct way. It is basically you moving your Demonic Power yourself while imagining the attack you want to unleash. That is the hard method, and almost no one can truly master it. But once you do, it becomes by far the strongest way to fight. The more creative you are, the more powerful and unpredictable your attacks become.
But that is also where its difficulty lies. First, you need excellent control over your Demonic Power, and you must be able to move it through your body extremely fast. The longer it takes you to move that power and release an attack, the weaker the attack becomes because of the leakage through your Energy Points. Second, you need to memorize every single Energy Point and Energy Line in your body, so you do not send the power through the wrong path while moving it."
"So, what is the best way to fight? That depends on the kind of fighter you are. If you are a close-range fighter like Saeko, you need to use Demonic Power to strengthen your body by moving it through yourself, especially into your arms and legs. So for you, I would recommend starting with the direct way immediately. That should be your main focus.
Mahiru, I want you to learn how to defend yourself first, so I want you to memorize as many magic circle spells as possible. I'll give you a grimoire to study. Once you have at least ten to fifteen spells at your disposal, I'll start teaching you the direct way."
Adrien then looked at Saeko. "I'll give you a tip. Before you enter a fight, always move your Demonic Power to your elbows and knees. That way, you'll be able to move them much faster when you attack."
"Why can't I just gather Demonic Power in my hands and feet?" Saeko asked.
"Because the Energy Points in your palms and the soles of your feet are the weakest in the body," Adrien replied. "They are good for releasing power because of their weakness, but not for storing a large amount of it."
Mahiru raised her hand. "I have a question. Why does our Energy Leakage hide us from the human world?"
"It does not hide you from their eyes," Adrien said. "It hides you from technology. The energy leaking from your body interferes with cameras, sensors, and other devices, making it harder for them to properly record supernatural beings. And before you ask, your phone cameras work perfectly fine because I added a special chip to your phones, one made by devil scientists."
Saeko then asked, "Why did you tell me to train by gathering my Demonic Power in my solar plexus?"
"Yeah, me too," Mahiru added. "You told me to gather it in the hollow of my throat."
"That's because once you reach High-Class Devil, the point where your Demonic Energy gathers the most becomes known as your Energy Base Point," Adrien explained. "Over time, that point is strengthened by your own power. The amount of energy that leaks from it is partially reduced, and it also strengthens some of the surrounding points.
Saeko, the solar plexus is near the center of the body, so it is more or less equal in distance from your hands and feet. That makes it the best choice for an all-around fighter.
Mahiru, the point at the hollow of your throat is closer to your hands, so it makes spell casting easier and more efficient."
Mahiru raised her hand again, "But isn't it better to just memorize spells instead of using direct powers? I think it's much more powerful."
"You could, but you would never be able to do something like that." Adrien raised his hand, and in an instant every tree in front of him was cut in half across an area seven meters wide and thirty meters long. Just as they were about to crash to the ground, Adrien snapped his fingers, and the wind split beneath them like the Red Sea, halting their fall. "There are no magic circles for abilities like that. I simply imagine what I want to happen and will it into existence."
"Wait, you're a master of direct energy control?" Saeko asked, her eyes widening at what she had just witnessed.
"Yeah. It's pretty easy when you're me."
"Huh? What do you mean?" Mahiru asked.
"Well, I told you that everyone is imperfect and leaks power from their Energy Points, right?"
"Right," she replied.
"Well, I don't leak energy. Unlike everyone else..." Adrien placed pointed to himself with his thumb and smirked. "I am perfect."
--------------------------------------------------------------
I'm trying to fully explain the power system that I'm using.
I will try to drop 7-10 per week, so it'll be less than last week.
I we reach 150 Power stones I'll drop a bonus chapter