I rested my upper body against a pane of one-way glass while watching Rias do her stretches to make her body ready for the training. I was currently tapping my feet as I felt like I did badly with how I went about gaining this large indestructible room as because there were multiple people behind this glass looking in on this training room.

The night before I had asked Rias if there was any place in the castle that would be a safe place for her to go all out with her 'Power of Destruction' and she had taken me through the training rooms and they wouldn't suffice. We ended up coming to Lucifer's castle in the Lucifer territory to use his training room. Behind the glass was Lord and Lady Gremory, Lucifer and Grayfia and finally, for some reason Serafall.

Once she had finished stretching, I had her unleash her strongest attack against a wall. I kept my eyes focused on the magic circle as she casted her attack and along with my glasses analysed the attack. Once it struck the wall I was deeply disappointed but it was not the same for the people behind the glass, the two males of Gremory sounded ecstatic as my extremely sensitive ears heard their clapping easily.

I huffed before letting out a disappointed groan.

"Awful … Are you even trying Rias?"

She looked towards me saddened.

"Now that I have tasted your blood I can tell you exactly what you are doing wrong. You are trying to further strengthen your attack by adding your demonic energy to the attack. That isn't something you should do because it'll dull it in all aspects. Your 'Destruction' will not destroy and will not be as quick. Have you ever heard the saying 'Don't mix drinks?'."

She looked at me sad and confused before shaking her head.

"A common misconception is that mixing drinks will get you drunk quicker but that's completely wrong, all is does is make you ill which in turn makes you think you got drunk quicker. It's the same here, it's the level of tolerance. I have told you before that your level of magic is good, very good but your understanding isn't and you are also young and inexperienced. Basically, you are out of your depth."

"Out of my depth?"

"Yes. What you are doing is correct but how you are isn't. It's a good idea to increase it's raw power by adding the demonic energy but because your know-how is poor you are doing it haphazardly. You are basically mixing and matching. With your magic, the Demonic energy should be the base while the 'Destruction' magic is the outer shell."

The way Rias did it was Demonic base, 'Destruction' filling and then a Demonic topping. It made it unstable or maybe even confused, 'Destruction' magic is primarily demonic energy. The standard elements were made before demonic energy so it's standalone and won't corrupt, it actually becomes easier to cast because of imagination. 'Destruction' is a magic made by a devil, the original Bael, so in truth it's just the raw power of Demonic energy amplified. Coating a ball of 'Destruction' in demonic energy will dilute or maybe even change it to be 100% demonic energy.

My explanation seemed to go down well with Rias and she learned from it remarkably quickly. The change wasn't instant but I could see that she was changing the process, the rest was just down to her ability and experience which she will gain over these five days of personal training with me.

The training was a full course of training, as she is first her training is really me setting what she has to do up until the game in stone. These five days are for me to correct her wrongs and allow her to grow further, the final ten days are for her to improve on it and build a new move or possibly shorten the process further.

…

When the night of the first day came, I decided to change it up a little from what I had decided. She was a much faster learner than I had expected and she was ready for something new on the fifth and final day, so when it came Rias seemed really happy to hear that I would be teaching her something. Most probably she was expecting something like the 'Light Puppet' move that I taught Kalawarnar and Raynare, I don't think she is quite ready for a move of mine and neither do I like her to the level of teaching her one.

Just like the first day, we were being watched but unlike the first day it was to see what I was going to teach her. As my knowledge comes from my Tsukiyomi blood, my ways of teaching run from that. Knowledge of a God would be interesting to them in many ways.

"Seen as your ability to learn surprised me, I will be teaching you something today."

Rias' face lighted up considerably. The move in question is remarkably close to my 'Celsius Calibre' but it won't be a condensed beam of power, it's a basic version of it. That is really the nice way of putting it which i'll be using with Rias to make it easier on me. In truth, it's just launching a beam of magic using your hand as the medium.

"What i'll be teaching you is 'Celsius Calibre' but at the basic level for now. You have only just learnt to use your powers properly through combination so I can't yet teach you the mastered stage."

"What do I have to do?"

I can at least praise her on her eagerness to learn, the simplest way to do this was to smile at her which I did.

"Manifest your 'Power of Destruction' around your favoured arm up to the elbow. This is the first step of the 2-step process."

She tried to do this in the silence, key word being tried. I watched her for ten minutes and there was absolutely nothing. I had expected something, Demon magic is supposed to be fuelled by imagination so that is the key here. It's the reason why she is failing but it'll also be the reason why she'll eventually succeeds.

When the fifteen minute mark came, Rias started to get irate and furious with herself when absolutely nothing happened. She screamed in anger as I just watched her with an amused face. She started to calm down when she noticed my smirk.

"...I'm sorry. I'm wasting your time."

"Oh … You aren't revelling in the time I've spent just staring at you? Is something wrong?"

"N-N-No, it's just."

She started to stutter while blushing once she realised that I would have been staring at her the whole time.

"Rias. The reason why it isn't working is because you are trying to hard to make it look like my ice tiger gauntlet."

"H-How did you know?"

"It's not like your obsession over me is apparent or anything. Once I mentioned I was going to teach you something, you brightened up considerably. Let me put it for you simply. Your power is flowing while mine is solid. If you really want it to look like mine then you have to visualize it accordingly. Within your mind, think about what my tiger gauntlet would look like if it was made out of your power instead. Also, you would have to hold you hand accordingly."

"Huh?"

"Hold your hands like I do mine. Your brain does know what i'm going on about but you can't piece it together. When I first summoned my armour I would make my thumb and index finger into a crescent which acted as the jaw and mouth. My armour formed around that, that is a vital component if you want it to look like mine."

Rias took a deep breath before trying again while making her hand take a crescent shape. She closed her eyes and imagined allowing her power to start to manifest itself but when she opened her eyes it disappeared again making her a little upset.

"You are doing well Rias. You gotta keep one fact in mind, unlike mine yours is flowing, it flickers around like an open flame and because of that it makes manifesting your power that little bit harder."

"As Ice is a solid form of magic, it doesn't take as much to create with it's only weakness being how brittle it is."

I refrained from praising her and just nodded allowing her to carry on.

Two tea breaks later courtesy of Grayfia and the others, Rias had finally able to keep it manifested while not being that taxing but that's only the first step. The next was on course.

"Now before we perform the attack, I need to know one thing."

"What's that?"

"How will the attack look? Is it a beam like 'Celsius Calibre' or a crescent-like wave of power like 'Lunar Surge'?"

"What's the difference?"

"It's the motion that creates the attack. This part is simply just imagination and doesn't take much hassle unlike the manifestation. The beam is a simple cocking back of your arm and then releasing it forward like a feinted punch, this comes from a single dot of magic that lives in the centre of your palm. The crescent-like wave is through a clawing motion, like a big cat taking down it's prey with a claw. Here, a dot of magic originates at the bottom of the top two fangs."

Rias seemed to understand and quickly started to try and perform the attack. She went with the beam, a punch is a more fluid motion for a humanoid compared to a clawing motion although, that may not have been Rias' reason.

The day came to an end with Rias not being close to perfecting it. We ended the day with her only just being able to release a beam which was weak and held no power or even control. It was pitiful and almost laughable, fortunately for her I wasn't capable of laughing at the time. I was thinking of where to go with Akeno the next day back at the Gremory castle, I had instructed her to get comfortable with ice and holy magic so she should be able to combine them by the time we start.

The other two chapters are slightly longer than this and are probably normal chapters worth so i won't be uploading them in one go mainly because i'm busy for once. Took a bit of a rest from writing because i had been at it non-stop while doing other things.
Unlike this chapter, the two to come aren't just training chapters. They are actual developing chapters as well to break up this 3 chapter segment of training before the Rating Game which i will yet again change up. Hopefully you guys will enjoy the change.
All in all, this chapter was just to get Rias on the right road more than anything. I had never planned for this to be any more than it is.

It's a light chapter come back after a few days gone. Hope you enjoy, Ciao-nya.