After great effort he killed the dragon and spitted it against an oak tree. At the command of Athena, after the death of the dragon Cadmus sowed the dragon’s teeth in the ground. From the teeth, a host of armed men sprang up who proceeded to fight and kill each other, all except five. Those last five survivors helped Cadmus to build the city of Thebes and when that task had been accomplished Cadmus was given Harmonia, the daughter of Ares and Aphrodite, to be his wife.
Edinger presents the Cadmus myth in full as the psychological drama of slaying the chthonic serpent, containing its energy in the oak, and founding civilized order — culminating in the coniunctio with Harmonia.
, The Mysterium Lectures: A Journey Through C.G. Jung’s Mysterium Coniunctionis, 1995thesis