You were killuas best friend. Your nen allowed you to go to the past whenever you wanted!

Your nen was hidden inside a gem. That couldnt get dirty. If it did it needed a Rare seed to clean it.

Killua had a bff name gon. Who he wanted to help. And gon is super helpful. And determined. But. In one of these fights. Killua was hurt badly.

In a minute or so he would die. But you would too. Bc you were injured too.

" rembere when I said I didn't have any other seeds? Well here. You can use it"