The Amulet

Dead Lilah Morgan gives it to Angel, aalong with a folder with some information about Sunnydale, in exchange for a new life for his son Connor, and medical and mystical care for Cordelia.

In handing the amulet (a Wolfram & Hart's property) to the vampire, Lilah says that it "apparently it's crucial for some kind of final battle". At first, Angel wants to keep neither the file nor the amulet, and says that "Buffy can handle herself"; but after watching Connor in trouble, he takes the amulet (Angel/Home), goes to Sunnydale (End of Days) and gives it to Buffy. He tells her that the thing is very powerful and probably very dangerous; it has a purifying/cleansing power, and bestows strength when worn by someone ensouled, but stronger than human — a Champion.

Buffy, being about to fight her ultimate battle against the First Evil and its army of Turok-Hans, gives the amulet to her Chosen Champion, Spike. In the middle of the battle, the amulet starts working, and originating from Spike's body, powerful beams of golden light destroy thousands of Turok-Hans in seconds. It causes the collapse of the Hellmouth, too, closing it forever. Unfortunately, Spike is consumed by fire from within, and burns to ashes, dying as a true hero (Chosen).

Seventeen days go by, and the amulet reappears in Los Angeles, at Wolfram & Hart, inside an envelope (without sender) sent to Angel — and from it, Spike is released. After some researching, Wesley concludes that Spike's essence has been trapped in the amulet, and nothing can destroy it — except if the object is taken to a consecrated place, like a church or a cemetery (Angel/Just Rewards).