Cú Chulainn's earrings

Jewel crafted into earrings are a relic from the life of Cú Chulainn, used as a catalyst to summon him as a Servant.^[1]

History

Role

Fate/stay night

Characteristics

A pair of ovaloid silver earrings worn by Bazett Fraga McRemitz and Cú Chulainn. They were engraved with original rune inscribed by Chulainn.^[1]

References

↑ ^1.0 ^1.1

[] Fate/complete material III: World Material - Records of Heavens Feel - Servant System: Servant Summoning, p.013

Servant Summoning
First, the Master performs a ritual to interfere with the Greater Grail, then the Greater Grail borrows the information of the main body of the Greater Grail in the Throne of Heroes.
The information (soul of highest purity of the Heroic Spirit) is blown into the container that is the Class, and the created copy of the Heroic Spirit is the Servant.
The Servant is an unstable existence that should not be in the world so its coordinates in the world have to be anchored, using the Master as the host. The Mater also has the role of supplying magic energy to the Servant.
When performing the ritual, the Master can designate the Heroic Spirit to be summoned by preparing a catalyst with ties to the Servant of his desire. When there is no catalyst, a Heroic Spirit with good affinity with the Master is summoned. In the case of catalysts for multiple Heroic Spirits (for example, the gates of Troy, the symbol of the Trojan War), the Heroic Spirit among the candidates that has good affinity with the Master will be chosen.

Heroic Spirit	Catalyst list
Artoria (King Arthur)	Avalon, the sheath of Excalibur.
Cu Chulainn	A jewel on which is engraved an original rune inscribed by Cu Chulainn. It had been crafted into earrings.
EMIYA	Rin Tohsaka's Jewel Pendant
Gilgamesh	Snake Skin
Medusa	Mirror dug up from a temple in Etruria. An item with ties to an old Earth goddess of Greece.
Medea	Literature, from Colchis, with ties to Medea
Sasaki Kojirou	The mountain gate.
Hassan-i Sabbah	Since Hassan is the origin of the word Assassin, the class of Assassin itself is Hassan's catalyst.
Heracles	A slab of rock from a temple of Heracles.

[CharacterM2Catalyst-1] 1.0 ^1.1

[v] Fate/complete material III: World Material - Records of Heavens Feel - Servant System: Servant Summoning, p.013

Servant Summoning
First, the Master performs a ritual to interfere with the Greater Grail, then the Greater Grail borrows the information of the main body of the Greater Grail in the Throne of Heroes.
The information (soul of highest purity of the Heroic Spirit) is blown into the container that is the Class, and the created copy of the Heroic Spirit is the Servant.
The Servant is an unstable existence that should not be in the world so its coordinates in the world have to be anchored, using the Master as the host. The Mater also has the role of supplying magic energy to the Servant.
When performing the ritual, the Master can designate the Heroic Spirit to be summoned by preparing a catalyst with ties to the Servant of his desire. When there is no catalyst, a Heroic Spirit with good affinity with the Master is summoned. In the case of catalysts for multiple Heroic Spirits (for example, the gates of Troy, the symbol of the Trojan War), the Heroic Spirit among the candidates that has good affinity with the Master will be chosen.

Heroic Spirit
Catalyst list

Artoria (King Arthur) Avalon, the sheath of Excalibur.

Cu Chulainn A jewel on which is engraved an original rune inscribed by Cu Chulainn. It had been crafted into earrings.

EMIYA Rin Tohsaka's Jewel Pendant

Gilgamesh Snake Skin

Medusa Mirror dug up from a temple in Etruria. An item with ties to an old Earth goddess of Greece.

Medea Literature, from Colchis, with ties to Medea

Sasaki Kojirou The mountain gate.

Hassan-i Sabbah Since Hassan is the origin of the word Assassin, the class of Assassin itself is Hassan's catalyst.

Heracles A slab of rock from a temple of Heracles.

[1]