Sweetie, you know, now that you're older... I think I'm going to make you something special... Something just in case...

Well, I guess you could call it an "Emergency Contact".

Watch... See that? That's the blood... Combining, making them like magnets to each other. With this, you'll always be able to find me because of our shared blood. And it's not icky. It's NEAT.

Now, new promise time. Never go near the gate was numero uno. Next, never take off this necklace. Promise?