The Key (Justice League villain)
The Key (Justice League villain) appears in 16 issues in grailworth's catalog, and was first published in 1965. First appearance: Justice League of America #41 (1960), cover dated 1965.
First appearance
Every appearance we value
The Best of DC (1979) 1 issue
DCU: Legacies (2010) 1 issue
Green Arrow (2001) 1 issue
JLA (1997) 2 issues
Justice League of America (2006) 2 issues
Character appearances from the Grand Comics Database, CC BY-SA 4.0.