Chromatic Keys

Chromatic Keys are keys that appear in multiple colors, and open gateways so that Heavenly Spirits can be summoned.

Description
Heavenly Spirits are similar to most spirits, but instead of standing for constellations, they instead represent celestial bodies such as planets. Instead of being summoned by contract, like Celestial Spirits, or being enslaved, like Dark Spirits, in order to gain the service of a Heavenly Spirit, one must give them something in exchange, which can vary from person to person. Once summoned, a Heavenly Spirit has little freewill in whole, normally doing simply as the summoner commands. A Heavenly Spirit possesses immense power, and can prove to be a dangerous force if used right.

Heavenly Spirits

 * Helios: The Sun. Helios is noted for being able to conjure fire, and manipulating it to his own means.  He also carries around a bow and arrow.  His key is bright red.
 * Poseidon: The Neptune. Poseidon is able to control water to his own extent, and he has a large trident.  His key is dark blue.
 * Gaia: The Earth. Gaia is able to use Earth and Rock magic, and she carried a large wooden staff.  Her key is dark green.
 * Cronos: The Saturn. Cronos carries a large scythe, and he is capable of teleporting himself, and his summoner to any assigned location.  His key is dark purple.
 * Ouranos: The Heavens.  Ouranos uses a large sword, and he can use wind magic to whatever means he deems necessary.  His key is white.