Gate of the Chisel Key

The Gate of the Chisel Key was the Celestial Spirit Gate Key that could be used to summon Caelum from the Celestial Spirit World.

Description
The Gate of the Chisel Key was the Celestial Spirit Gate Key that could be used to summon Caelum, the Chisel, from the Celestial Spirit World. It was one of the Silver Celestial Spirit Gate Keys, which each represented one of the constellations seen from Earth that were not one of the Zodiac constellations (which were instead represented by the Golden Celestial Spirit Gate Keys), with the Gate of the Chisel Key representing Caelum, the Chisel. It appeared as a silver key that was adorned with the symbol of the Chisel on its bow. As with all Celestial Spirit Keys, it would not function or respond to any commands or use of magic unless its corresponding Celestial Spirit, in this case Caelum, was first bound by contract to the mage who possessed the key. If a contract was established between Caelum and a mage, the mage could then summon Caelum by brandishing the key and shouting, which opened the dimensional "gate" that existed between the mage and Caelum, allowing him to pass through to the mage's universe.

History
In 150,081 CMT, Zev Raregroove told Kokonoe that the Silver Celestial Spirit Gate Keys he owned were the keys that represented Canis Minor, Leo Minor, Crux, Horologium, Caelum, Triangulum, Telescopium, and Lyra, and that his Golden Keys were Aries, Leo, Sagittarius, Taurus, and Gemini, with "Caelum" referring to the Gate of the Chisel Key. When Kokonoe asked him if he would be willing to demonstrate some of their abilities, Zev picked out the Gate of the Chisel Key and used it to summon Caelum to the Bebop II. Zev instructed Caelum to, so Caelum fired a blast of energy at a training robot that blasted open its abdomen. Zev then used the Gate of the Chisel Key to return Caelum to the Celestial Spirit World.