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My father was right. I had to go all out with my powers, and not just physical strength. It was especially so because I was still growing, and it was obvious that I would be weaker than him even if he went easy on me.
I had to compensate it with a bit of magic to even things out for me!
Infusing mana into my blade, the black jewel glowed brightly with an eerie black and purple light.
FLASH!
Suddenly, an aura of black and purple light encompassed my entire blade.
CLASH!
My father's attack was intercepted by my blade once more as sparks of darkness were released around me. I suddenly felt as if the darkness was rushing through my arm and spread through the rest of my body.
What is this? It's actually… enhancing my physical capabilities! So, that was it! Did he know of this ability within the blade?
Check "The Protagnist's Sister Is Actually the Strongest"!