I can’t wait anymore, some spoil me please! Okay what was the mistake they made ???

Not sure if this is a spoiler since even i don't know, however;
Based on the letters Leslie has been reading.. when silver haired children whos power is 10, the transfer amount is never 10(usually its what..4.5?) Meaning at least a large amount of that power is going missing.(like..5.5)

Theory of mine is that power is carrying over to the next silver haired child to become 15.5, and the next (to like 20 ect) meaning Leslie has a ton of power.

The mistake was they were essentially creating an unstoppable power in the silver haired children and Leslie, being the most recent of those children...possibly has ..well..A LOT of power

I agree with this theory. It explains the info written in the notes, as well as Leslie seeing/hearing all these children and being able to use a massive amount of power to save herself. Maybe that leftover amount is retained in each child’s soul and, as you said, carried over to the next generation.

THANK YOU SO MUCH I was so confused

Thank you so much, i really couldn’t wait. And it explains a lot you’re theory

yes!! oml thank you for this

thank you so much!! your explanation was very clear and it resume it vere well ヾ(❀╹◡╹)ﾉ~

I think it’s very close but instead of the missing power going to the next child, I think it’s retaining itself as the emotions of the child that died. So while she may have a power of 10, the darkness itself is stronger as it contains remnants of the children and the power they kept when they died.

True…..it could be a build up of emotions that made the power so great.

Thank you for this <33333