Where am I… Who am I… no, Why am I… Why am I in here?!?!
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"Now then, let's officially start the class. So, since you already knew how to use magic without incantations, I'm sure you already knew how it exactly works right?"
I nodded. It was pretty simple, especially if I'm using my knowledge from the novels I have read in my previous world. Magic in simple terms is the process of picturing something and then creating it in reality, which this explanation is inspired by R*muru. Sure, magic is more complicated than that but that is the gist of it.
Now, from both my research in magic and learning the basics from my sister and my unique skill, the magic system follows similar to M*shoku T*nsei and that sl*me isekai, where magic is simply just the manipulation of mana, or in this world, magicules to form what the caster wants. The basic process of magic is Spell Genesis, Determination of Size, Determination of Speed, and Activation. All of these steps are either given in the words in the incantation or inscribed into the patterns of the magic circle.
The difference between using an incantation or not is that using without an incantation means the entire process of casting the spell is being done in the caster's brain or simply using the caster's mind to manipulate magicules with himself as the medium rather than using a fixed medium like symbols, magic circles, patterns, or words.
The basis of using magic without incantation starts by imagining the shape of the spell, and then there will be a short window of time where the caster can add more magicules to increase its size, followed by another short window of time to determine the velocity, and then release.
Now from first glance, it seems that using an incantation is more useful than not using one because everything is done automatically. However, using magic without incantations is more useful.
First of all, is the difference in speed, it is very inefficient for a mage to take 1 minute or longer to chant a single spell especially while in battle, but using without incantations will let you cast it almost instantly as you just need to imagine it enough and do the process in your head. Of course, this is harder than using an incantation but when you get used to it, you will be able to cast it a lot faster and more efficiently than using an incantation.
Another advantage of not using an incantation is that you can manipulate the amount of magicules or the speed of the spell directly. Using the basis that I was talking about before, in that small window of time where you can add additional magicules to increase in size or velocity, you can directly manipulate it to however you want and can make even the most basics of spells to be stronger than what they are intended for.
Now, it's not like anybody can just use magic without incantation even if they knew this knowledge. More practice and concentration are needed for this to work. After all, half-assing one of the parts of the process can greatly influence the result of the spell and it takes a long time to repeat and perfect using magic without incantation to the point you can do all of that process in your head subconsciously. And there is also that one factor that really differentiates how well someone can use magic without incantation, and it's how they are imagining the spell in the first place.
The difference between someone who got reincarnated from my previous world or an inhabitant in this world is their knowledge. Science and technology in this world are really not as developed as in my previous world. Since I have knowledge about how most of the elements work due to advanced science and technology, I would have a great advantage and an easier time learning magic without an incantation than those who don't have knowledge as I do. This is what sets apart people that are reincarnated and those who are not. There's also that thing called talent like my sister but I'm not going to explain that part considering my sister is the very incarnation of someone who has immense talent in magic.
Enough talking about magic, it's time to talk about the lesson. The lesson started with me using different spells ranging from Beginner rank to Advanced rank that correlates to the elements that I have an affinity with, or at least the elements that they know I have an affinity with which is Ice and Dark. The higher the spells I used, the longer it took for me to cast them since I'm not used to using higher-level spells without incantations but eventually I did learn it all.
Also, I'm just noticing it right now but which part of this class, is a class? After all, from the beginning and now, she still hasn't taught me anything regarding magic and stuff except for practicing various spells. I guess practical lessons are still considered part of learning but we haven't learned anything else besides that. Probably it's because I already knew most of what she has prepared for me today and that's why it is more practical lessons rather than the ones I'm used to.
I was about to ask my sister a question when I saw a concerned look on her face. Crap, did I mess up or something?
"Tomo-chan, are you still able to use magic with the remaining magicules you have? You have used a lot of spells without stopping now so I was wondering if you still have remaining magicules or not."
Oh, she was worried about this? Phew, I thought it was something else that I don't know.
"Oh I'm still fine, I still have about more than half of magicules left so I should be good."
"Really?! You have used so many spells already and you still have more than half of your magicules left? This isn't the normal amount of magicules for a 5-year-old should have… Did you expand your magicule capacity? Since when?"
I chuckled nervously. How could I forget? I was expanding my magicule capacity for these past months to be more efficient at practicing magic in secret but I forgot that it expanded to at least 10 times more magicules than what I started with. Man, I should really need to be more careful about these things.
"Well then, since you have more magicules than I thought, how about we have a little test?"
"A test?! On the first day of class?"
"Hehe, I say it's a test but it's more to check on how skilled you are right now. Besides, I want to see how strong you are right now so that's that. Well then, let's get started!"
"But what am I supposed to do?" I was confused, why would she want to see how strong I am right now? Maybe she is using this for ideas on what she needs to teach me in the future, if she is then she is really a great teacher.
"I want to use the most powerful spell that you are able to use without any incantations. Also, if we are doing this, we should probably go somewhere that we can use for something like this, umm… Well, here goes nothing, [Spatial Motion]"
And at that moment, I suddenly remembered something. That's right, this is the same spell she used when she suddenly teleported us to some random location, crap! We are doing this again?! And at that, we are in the middle of some forest.
Piles upon piles of white sheets of snow around us. Trees that seem to reach the sky are covered with snow and with branches filled with small icicles hanging on them. Great, we are doing this again.
"Ok, you can start now."
I had a bewildered look on my face as I try to think about the situation right now. Hmm, if she wants me to show how strong I am in magic, I should at least do the best I can, I guess. Now, I should probably use magic that belongs to the Ice or Dark types so that it lines up with what magic I am known to have an affinity with. Now that is gonna be hard. I'm fine with Ice-type magic since it is just freezing or making ice but I don't about Dark. I guess [Space Magic] is under Dark-type magic so I guess I can use that, hmmm.
"Um, Fuyumi-nee-san, can I use multiple magic at the same time?"
"Sure! That will be more impressive if you can do that."
"Ok, then can you float us to somewhere high and far from this spot so that we won't get caught into it?"
"Eeh, are you confident that it is able to destroy my barrier then?"
Oh right, her barrier. She can make multiple barriers around her using her [Unique Skill: Magic Ruler] which basically is an encyclopedia for magic and lets her use magic more efficiently. I know that her barriers are pretty strong from what I heard but since I don't really know how strong it is, I can't rely on them, especially if I'm using this caliber of magic.
"Yes, I haven't seen how strong your barrier is so I'm a little concerned about it."
"Eeh, well then." She had a sad look on her face, she must be really proud of her barrier's strength then if she is this sad.
She teleported us high up and set up a barrier around us. Before I start using this magic, I should probably check if this works. 'Hey [Knowledge], is this magic possible to use with the remaining magicules I have?'
"Answer. It is possible."
Alright then, that is all I need to hear.
"Well then, Advance Magic [Gravity Ball], Intermediate Magic [Small Barrier], Advance Magic [Frozen Fields], Advance Magic [Glacial Pillar], Advanced Compound Magic [Molten Sea]."
A small ball of energy started to create immense gravity in its surroundings. A barrier formed just outside the range of the [Gravity Ball] and there the surrounding air started to freeze. A large ice pillar started to form as well and I manipulated it to cover the barrier and the freezing air. Another barrier started to form to cover the freezing ice. There, large melting lava started to form on the barrier, and once again, I manipulated it to form another barrier. I should really release it now since the gravity is about to destroy the barrier.
"Compound Magic, [Gravity Collapse]!"
A large explosion was formed. The explosion covered the surrounding forest and completely destroyed it. The scene was devastating and breathtaking. The explosion was so massive and loud that the barrier around us almost cracked and I was almost deaf from the explosion. My ears started ringing when the explosion happened. God, this hurts.
I didn't expect the explosion to be this powerful! Wow, this is how strong I can already cast?! Isn't this the same energy as a missile? I was just mixing some high-level magic together but I didn't know it is this powerful! Oh dear, I wonder what my sister thinks about this…
I turned around to see her face filled with excitement. Eh? Why does she look like that?