The underlying logic of this world was quite interesting.
If something looked like an apple, smelled like an apple, tasted like an apple, and was observed by everyone as an apple, then it was an apple.
There could be no such thing as "its essence is an orange, but it is disguised as an apple."
In other words, as long as the world only acknowledged observed phenomena, phenomena were the entirety of its essence.
And this was also the essence of magecraft in this world—
To put it by analogy, in worlds like Naruto and Under One Person, the essence of ninjutsu and Outsider abilities was the conversion of energy such as Chakra and Primordial Qi into fire and thunder.
At its core, it was the conversion of a nearly omnipotent energy into energy and matter, fundamentally no different from household appliances or industrial equipment.
It was merely because of the energy's peculiar nature that the intermediate process had been simplified, eliminating the need for enormous machinery.
But the magecraft of this world was different. It did not convert magical energy.
The truth of magecraft was to inject magical energy and forcibly distort and alter the world's observed result of a "phenomenon."
If magical energy made the world believe that the air here possessed the property of "burning," then flames would be born.
If magical energy made the world believe that your body possessed functions that "surpassed ordinary humans," then you could run faster than a bullet.
A classic example was Shirou Emiya's Projection Magecraft.
Kenneth brought up a holographic screen, displaying two blueprints side by side.
One was the Tohsaka Family's jeweled sword based on the Second Magic.
The other was the "Aurora Curtain" generator of Great Shocker, an organization from another world.
And based on this world's definition