When the eagle was killed, Prometheus 1, after thirty thousand years of being chained and tortured, was freed and could leave Mount Caucasus. But some say that Thetis did not wish to lie with Zeus because she had been brought up by Hera , and that Zeus punished her by marrying her to a mortal. Prometheus 1, being a Titan, should be immortal by birth. But some say that Prometheus 1 was granted immortality. So Prometheus 1 offered himself to Zeus to be immortal in his stead, and so Chiron died and Prometheus 1 became immortal.
Rings remind chains.
Wreath for victory. Some have said that Prometheus 1 wore a wreath, as if to claim that he as victor had revolted and did not suffer punishment for ever. And so the practice began of wearing wreaths at time of victory or rejoicing. Miraculous herb and charm. Medea is said to have used in her sorcery a Caucasian herb of great potency, sprung from the gore that dropped from the liver of Prometheus 1.