Teen Wolf, Season 3

Deaton:
Essentially, you, Allison, and Stiles need to be surrogate sacrifices for your parents.

Scott:
We die for them?

Stiles:
But, he can bring us back. [to Deaton] You can... you can bring us back, right?

Deaton:
You remember the part where I said it was dangerous? If it goes right, the three of you will be dead for a few seconds. But, there's something else you need to think about. This is a dangerous thing for more reasons than one. You'll be giving power back to the Nemeton, a place that hasn't had power for a long time. This kind of power is like a magnet-- it attracts the supernatural, the kind of things that a family like the Argents can fill the pages with a bestiary with. It will draw them here, like a beacon. [...] It'll also have an effect on the three of you. You won't be able to see it, but you'll feel it. Every day, for the rest of your lives. It'll be a kind of darkness around your heart. And permanent, like a scar.