Another of my favorites, from THE SPECTRE 9, in 1969, "Abraca-Doom", a great early story by then-emerging talents Dennis O'Neil and Berni Wrightson.



http://diversionsofthegroovykind.blogspot.com/2009/10/famous-first-fridays-bernie-wrightsons.html

The cover is by Nick Cardy. This brief 10-issue series not only featured a number of great emerging artists in its 1967-1969 run, but a tremendous variety of talents for such a brief series. Most noteworthy Murphy Anderson in issue 1, Neal Adams in issues 2-5, and O'Neil/Wrightson in this issue.