A/N:
Okay so I know many of you get confused about Aizawa being able to 'erase' killuas power. I should have explained it beforehand 😅 sorry everyone🥲☺️
So basically Aizawa also has the ability to close potential nen noodes. Meaning, killua's ability to control his aura and use it as nen will be cut off. (Or more like sealed off😅)
He becomes like a normal person in the HxH universe. Like he was before he and gon learned nen.
Remember in HxH, when wing opened their nen noodes by exposing them to a nen attack? Yeah it's like that , only the opposite. Aizawa is erasing that effect, bringing their nen noodes back to their original form.
He's not directly erasing his life force , aka aura. If he did he'd kill him. The only effect it has on killua is his ability to use and control his aura (Nen)
If you want a refreshment of how nen works you can go to episode 29 of HxH🙃🙂
I apologise if my explanation was bad 🥲
Love you all ❤️🩹❤️