Dragon City Dragon Egg List. Acoustic. The Adamantium Dragon eggs in Dragon City. Adamantium. The Adventure Dragon eggs in Dragon City. Adventure. Did you know -- SP originally had another name for the new legend icon. They intended to release another new element named eternal. For unknown reasons. Contents[show] Definition Elemental Dragons (Elementals) are Dragons that their Element, with the exception of the Light Elemental called Archangel Dragon.