ANGEL: So it's eating the hearts of heroes, and their blood is what keeps it alive.

FRED: Yeah, but it does more than that. It acts like a kind of supercharged rocket fuel. Makes it, you know...

WESLEY: Nigh invulnerable.

SPIKE: Oh, I could kill it. I mean, ghostiness to the contrary. Well, come on, lads. Everything has an Achilles heel.

ANGEL: And you just so happen to know this creature's Achilles heel?

SPIKE: I wager it's the heart.

FRED: You see that in the science?

SPIKE: No, luv, in the poetry. We're dealing with a mythic creature here, a kill-or-be-killed kind of creature. If I was gonna kill something that was trying to take my heart, I'd try to bloody well take its heart first.

GUNN: (walks into the room) And you'd be doing the right thing. That'd stop it for the time being.

ANGEL: Time being?

GUNN: Yeah. He's kinda got a get-out-of-jail-free card. It's in his contract.

FRED: Contract?

GUNN: Figure of speech. Curse, hex, any shady supernatural deal— Wolfram & Hart has a record of it. Tezcatcatl was one of the Aztecs' most powerful warriors. He forged a mystical talisman that would harness the power of their sun God, make him supernova powerful. But he got found out, was sentenced to die on the Aztec version of day of the dead.

WESLEY: So he made a mystical deal.

GUNN: Yeah, it was pretty clever, really. He had their shaman put a curse on him to return from the dead every 50 years. Been doing it for centuries. Usually, that'd be a bad thing, but, in his case, it brings him back so he can keep searching for the talisman.

FRED: Any idea what happened to the talisman?

GUNN: It was given to a great hero in charge of protecting it.

ANGEL: Which gets passed down through the generations so each time this demon returns, it's searching for that talisman.

SPIKE: And if it finds it, the demon becomes sun-God powerful, and you sods become a series of hearty snacks.

WESLEY: Is there a drawing of it?

GUNN: Negative. All I know is that it's gold, about the size of a quarter, and has the sun and some other spooky mumbo-jumbo carved into it.

(Angel flashes back to the small gold medallion on NUMERO 5's shrine. He runs out of the room in a hurry.)

SPIKE: Oh, see! Drama queen.

written by: Jeffrey Bell; Original transcript by CariCranberry. Edited & formatted by me.. Full transcript at:
http://www.buffyworld.com/angel/season5/transcripts/5x06_tran.php