Goldphoenix is the Contract Monster of Kamen Rider Odin.
Appearance
Goldphoenix resembles a Robotic Phoenix and it only appears twice in the series. One when it sends Odin his sword, and once in the final episode where Odin activates his Final Vent.
History
It is assumed that like all other Mirror Monsters, that Goldphoenix was created by Yui & Shiro's Pictures from their childhood. Because of Odin's Tendency to reappear, it is not know what happens to Goldphoenix when it's contractor dies. It is also not know what happened to Goldphoenix at the conclusion of the Rider Battle, but following the Time Reversal, an assumption can be made that it never existed to begin with.