Your search for "Nighthawk, Dark Defender 604" revealed the following:
Nighthawk, Dark Defender (MSC) from Marvel Super Heroes Commander, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Jurijus Chitrovas Card Text:FlyingWhenever Nighthawk or another Hero you control enters, target creature gets +1/+1 until end of turn.
Nighthawk, Dark Defender (Foil) (MSC) from Marvel Super Heroes Commander, available at 401 Games Canada. Rarity: Uncommon Finish: Foil Artist: Jurijus Chitrovas Card Text:FlyingWhenever Nighthawk or another Hero you control enters, target creature gets +1/+1 until end of turn.