Action Comics (1938-2011) #521

"The Deadly Rampage of the Lady Fox" Starring Vixen
"Grow, Little Growfish!" Starring Aquaman.
This issue is the first appearance of the Vixen outside of the rare Cancelled Comic Cavalcade #2. Vixen will one day become a member of the second incarnation of the Justice League of America, as well as the second incarnation of the Suicide Squad.