D&D 3.0: Tales from Mystara
Prime Minister Sir Atrey Gariat of the Kingdom of Nathania expended vastly resources in this wondrous machine to allow the The King Companions to travel the other realms and other planes of existence.
The machine combined very expensive alchemy material with magic from the four elements of Fire, Water, Air and Earth combined to make a flying, underwater, spacefaring artifact of magic.
The Phoenix is carved like a Bird with retractable sails in the shape of multicolored wings. The flag of the Kingdom of Nathania is used.