Golden Fleece

The Golden Fleece is a magical artifact with powerful healing powers. According to Greek Mythology, the original Jason collected the artifact on his journey.

Chrysomallus
Chrysomallus was a fabulous, flying, golden-fleeced ram.

Athamas the Minyan, a founder of Halos in Thessaly but also king of the city of Orchomenus in Boeotia (a region of southeastern Greece), took as his first wife the cloud nymph Nephele, by whom he had two children, the boy Phrixus and the girl Helle. Later he became enamored of and married Ino, the daughter of Cadmus, bringing drought upon his land when Nephele removed herself. Ino was jealous of her stepchildren and plotted their deaths: in some versions, she persuaded Athamas that sacrificing Phrixus was the only way to end the drought. Nephele, or her spirit, appeared to the children with a winged ram whose fleece was of gold. The ram had been sired by Poseidon in his primitive ram-form upon a nymph, Theophane, the granddaughter of Helios, the sun Titan. Poseidon carried her away to an island where he made her into a ewe so that Theophane's other suitors could not distinguish the ram disguised god and his consort.

On the ram the children escaped over the sea, but Helle fell off and drowned in the strait now named after her, the Hellespont. The ram spoke to Phrixus, giving him heart, and took Phrixus, whose name means "curly"—as ram's fleece—safely on to Colchis, on the easternmost shore of the Euxine (Black) Sea. Phrixus then sacrificed the ram to Poseidon and settled in the house of King Aeetes of Colchis and lived to a ripe old age. He hung the Golden Fleece reserved from the sacrifice on an oak in a grove sacred to Ares, where it was guarded by a dragon. There it remained until taken by Jason. The ram became the constellation Aries.

Polyphemus
An unknown time after Jason had obtained the Golden Fleece, it was taken and guarded by Polyphemus the Cyclops. He used it to make his island better (for himself), and to lure Satyrs there so he could eat them. The Satyrs were drawn towards it's powerful healing nature magic thinking it was the god of the wild, Pan. The fleece was hung on a tree guarded by flesh-eating sheep.

The Sea of Monsters
Percy, Annabeth, Grover, and Clarisse stole the fleece from Polyphemus, and got it to Camp Half-Blood. It was used to cure Thalia's tree, and is now guarded by Peleus. However it's healing properties also freed Thalia, which was part of Kronos' plan to control the Great Prophecy (Thalia's spirit was revived from her pine tree before she was 16).

The Lost Hero
The fleece was seen in the distance when Annabeth took Piper on tour of Camp Half-Blood, with Peleus guarding it. Piper having only realized she was a demigod that same day didn't believe the fleece to be real until Annabeth told her.

The Fleece's Power

 * It can cure anything natural (living). It makes the grass, flowers, and all the plants more healthy and it can heal humans.
 * It helps strengthen the borders of Camp Half-Blood
 * Lures satyrs with its powerful aura.
 * When wearing it, demigods are healed faster than normal.
 * It can cause the plant life in an area to grow faster than normal, and bear more produce.