Spike claims Buffy reveals the Slayers past

In Season 5 Spike claims Buffy and she begins to feel strange before going into a coma. He tells Giles that the Slayer was once a vampire lord or something. Pure vampire I think is what he said. Something about the Crusades and curses as well.

Yeah I know it's not much to go on but it is a very different fic so I doubt there are many options to chose from. Please help me find it?!

THANKS ONCE MORE!!!

If it helps, I am pretty sure it was when Glory tortured him. Could be wrong though.

It sounds a bit like one I'm trying to find.

Buffy goes to Spikes crypt to find out if he told Glory about Dawn and they end up mated somehow.
Buffy has a panic attack because she thinks Spikes chip has stopped working and ends up kinda catatonic.
Spike takes her to Giles' house and tells him all about the first slayer.
She was some kind of vamp that didn't believe in killing humans and fought against those who did, Spikes demon was one of her followers while angelus' demon was one of the baddies.

Does this sound like what you're looking for? if not...sorry for hijacking your thread

If it is the one the only other things I can remember is its definitely compleat and I'm pretty sure that I read it on this site.

Autezma_mete
Is this the fic your looking for??
The Better To Bite You With by Joyful Dayz

That's it! Thank you bitemee.
Hope this was the one the OP was looking for as well.

Thanks again.
Mete.

Yes that was the one. Thank you!!!