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Black Mass

5 appearances in the database · 4 series
Who's Who: The Definitive Directory of the DC Universe
#4
★ First appearance
Who's Who: The Definitive Directory of the DC Universe #4
Jun 1985

Appearances

Who's Who: The Definitive Directory of the DC Universe (1985)
#4
The Power Company (2002)
#5#8
Justice League of America (2006)
#17
Justice League United (2015)
#2