So, most mythical creatures are in the astral plane. I've read that dragons ( I don't know if this is all creatures or just dragons ) are very wise. Some people also think dragons used to exist on the physical plane. Could it be that once you reach a certain level of intelligence that you exist on the astral plane instead of the physical one ? I don't mean straight up randomly disappear, I mean once the species itself has figured their path out, they go to the astral plane ans help other species ? I'm sorry if this is fluff stuff, I just wanted to ask.