"Your parents aren't supervillains, are they? Because generally speaking, even the people I know who develop combat spells aren't that detailed about the effects on their target."

Like, yes, Lina Inverse did develop the Giga Slave, but she generally summed it up by 'wholescale destruction' and 'I am never casting that again'. No need for details. (If shit was hitting the fan to that level, you were too busy getting as far away as possible and hoping Lina didn't fail to control the spell.)

"You wouldn't be the first person I've met with unfortunate relatives, so it's no reflection on you."