Ownership of the staff of Estelle 3

I gave Euphemia a condemning look. "Did you seriously try to use me as an experimental subject?"

"Yes, but don't worry. None of my experiments that make it to human trial ever fails, well at least 97% of the time," she said proudly. "And look, you didn't get hurt, right?"

"That's because I used my aura. If I was even a single second late and my finger would've been cut off."

"Don't worry, with this, it'll grow right back to normal. And even if it fails, I have high-grade healing potions at the back capable of attaching it back just in case."

Seriously, what's wrong with this girl? And why did she say 97% of the time? What happened to the other 3%?

I grabbed the vial she was holding and looked closely at it, expanding my mana sense and focusing it on my eyes. I could see the intricate details of mixtures of magical ingredients inside it.