Faust would later star in the 2001 JLA: Black Baptism storyline as one of the main characters, his origin from the Outsiders run revised as well as the nature of his powers. Although the character was unused for a few years afterward, he would reappear in the 2006 Checkmate series, depicting under the new designated name of "Rook Gamma" as an elite operative & mystic consultant of the fictional intelligence agency, Checkmate. Sebastian would also have a supporting role in other crossovers, including the Brightest Day crossover, appearing in the Justice League of America and Justice Society of America series though seemingly no longer a member of Checkmate.
