Mazdak (Persian: مزدک, Middle Persian: 𐭬𐭦𐭣𐭪, also Mazdak the Younger; died c. 524 or 528) was a Zoroastrian mobad (priest), Iranian reformer, prophet and religious reformer who gained influence during the reign of the Sasanian emperor Kavadh I. He claimed to be a prophet of Ahura Mazda and instituted social welfare programs.