Misspelled eon

Nero stared intently at the perfectly shaped octagon, with razor-sharp edges and perfectly equal length between each corner. If someone saw it, they would be impressed by Nero's precision, but only if they were unaware that it contained a spell model that was a near perfect fit inside of it. The reason it was near perfect was because Nero discovered that if the container of the spell model is the same size as the model itself, the model will disintegrate. The model can never touch the edge of its container, which means that the container must always be bigger.

It had taken him an embarrassing two and a half days to achieve this, which went over his mothers deadline, but they didn't seem to be mad.

"Great. Now all you need to do is master crafting Earth's Boon and we can work on altering the spell model," Marilyn said, her voice completely even. Nero could obviously tell his parents were impressed, but since they didn't want to mention it, he didn't either.