Triptolemus.
God of agriculture, Triptolemus was chosen by Demeter (Ceres) to teach mortals the skills of cultivation. He was variously identified as the son of Oceanus and Gaia, of the hero Eleusis (after whom the Attic city was named), or, in the most familiar version of the myth, of the Eleusinian king and queen, Celeus and Metaneira.
    When Demeter, disguised as an old woman while searching for her daughter Persephone, was sheltered by Celeus and Metaneira, the goddess nursed their son Demophoön (or his brother Triptolemus) and held him to the fire to make him immortal. Metaneira discovered her at this task, forcing the goddess to reveal her divinity. In most versions of the tale, Triptolemus is identified as the elder brother, who recognized Demeter when she came to Eleusis and told her of her daughter's fate. Triptolemus became a favorite of Demeter; she taught him her secrets and gave him seeds and a plow.
    Triptolemus traveled throughout the world imparting the secrets of agriculture to mankind. When he came to Scythia, he encountered King Lyncus, who, jealous of Triptolemus' knowledge, attacked him with a dagger while he slept. Demeter interceded and saved him by transforming Lyncus into a lynx. The Eleusinian mysteries were established in honor of Triptolemus and Demeter, and a temple was dedicated to Triptolemus at Eleusis.