Buffy the Vampire Slayer, Season 7

Ancient Woman:
You pulled it out of the rock. I was one of those who put it in there.

Buffy:
What is it?

Ancient Woman:
[admires the scythe] A weapon. A scythe. Forged in secrecy for one like you who... I'm sorry. What's your name?

Buffy:
Buffy.

Ancient Woman:
No, really. [Buffy shrugs] We forged it in secrecy and kept it hidden from the Shadow Men, who-

Buffy:
Yeah. Met those guys. Didn't really care too much for 'em.

Ancient Woman:
Ahh, yes, then you know. And they became the watchers. And the watchers watched the slayers. But we were watching them.

Buffy:
Oh! So you're like... what are you?

Ancient Woman:
Guardians. Women who want to help and protect you. We forged this centuries ago, halfway around the world.

Buffy:
Hence, the Luxor Casino theme.

Ancient Woman:
Forged there, it was put to use right here... to kill the last pure demon that walked upon the Earth. The rest were already driven under. And then there were men here, and then there were monks. And then there was a town, and now there was you. And the scythe remained hidden.

Buffy:
I don't understand. How is it possible that we didn't know any of this?

Guardian:
We hid, too. We had to, until now. We're the last surprise.