That time I didn’t follow what the novice magic book said but I still managed to use the spell. Though I could explain that with the chant shortening, at that time I didn’t shorten that chant, I just “skipped” an important part of it.
I think that something is amiss about this.
Let’s think, when I threw the mana ball, I imagined myself shooting with a grenade-launcher loaded with some highly-explosive ammo. While I was using the magic, I unconsciously made the weapon intervene, probably because I was used to it and familiar with it in my previous life.
That resulted in a shot much stronger than usual which neutralized the goblin. Before that, the【(Impact)】I used never did anything more than a mark on a target or pushing a small object, it was strange for that weak power to be strong enough to blow away a whole goblin.