Mardonius came back into favour under Darius' successor Xerxes I, Mardonius' cousin and brother-in-law. Xerxes was at first not interested in renewing the war with Greece, but Mardonius, who had the most influence on Xerxes in all of Persia, repeatedly tried to convince him that he must avenge Darius' defeat. This view was opposed by another of Xerxes’ advisors, Artabanus, who urged more caution in the matter. Herodotus, who portrays Mardonius as a somewhat evil adviser (as opposed to a number of other good advisers whose arguments are never followed), says that Mardonius simply wanted to become satrap (governor) of Greece and had a love for 'mischief and adventure'.