Till time's ten thousand years have measured out their length" as he is tied to a rock where an eagle gnaws on his liver.
This figure's name appears in the title of a poem in which the persona declares, "I know of nothing more wretched under the sun than you gods!", written by Goethe. The main character of Ayn Rand's Anthem renamed himself this. Originally, he bemoans "the grinding anguish that shall waste my strength, Till time's ten thousand years have measured out their length" as he is tied to a rock where an eagle gnaws on his liver. For 10 points, name this mythical character who is "Unbound" in a work by Percy Shelley, and "Bound" in a play by Aeschylus.
This figure's name appears in the title of a poem in which the persona declares, "I know of nothing more wretched under the sun than you gods!"
Prometheus