It is revealed in ' Evergreen' and ' Astral Plane' that the comet has hit the planet repeatedly, always bringing with it some kind of agent of change.ĭuring the Cretaceous period, a green incarnation of the comet approached Earth, and it was known that on this occasion its impact would cause massive devastation, even killing Urgence Evergreen and the other Elementals.
A Catalyst Comet is a massive comet that hits the Earth every 1000 years.
