Featured in these Comics
Other Personas of Jack Power
History
FIRST APPEARANCE: Power Pack #1 (August, 1984) (as Mass Master); Power Pack #32 (October, 1987) (as Counterweight); Power Pack #55 (April, 1990) (as Destroyer)
FIRST APPEARANCE: Power Pack #1 (August, 1984) (as Mass Master); Power Pack #32 (October, 1987) (as Counterweight); Power Pack #55 (April, 1990) (as Destroyer)
