A Dragon (n.) is the lowest and most unformed shape of the king, at first a deadly poison and later the antidote itself.
A Dragon (n.) embodies the negative mother-image — the fear of what follows breaking the incest taboo — which is why it guards the treasure.
A Dragon (n.) is a monster combining the chthonic serpent and the aerial bird — the oldest pictorial symbol of alchemy, the tail-eater inscribed 'the One, the All.'
A Dragon (n.) may be a fossil: Jung supposed evolution left reptilian images lying in higher animals, as a dog born near no water still knows how to swim.
The Dragon (n.) and the hero might be a pair of brothers: the hero takes over the dragon's invulnerability and serpent's eyes, as Christ identified himself with the brazen serpent lifted up.