Detective Comics
Mysto was a regular back-up feature in "Detective Comics" #203–212 (October 1954). He was dropped when "Detective Comics" went from 44 pages to 36. Mysto's only Modern Age appearance was in "Detective Comics" #500 (March 1981), in a special anniversary team-up story featuring Slam Bradley, Roy Raymond, and many other detectives that had once appeared in previous issues.