My original tumblr post was here. Original text:
Tweeted by Javier Agrafojo with the text “‘A dream of blood’ by Roy Thomas (w), John Buscema (p) & Tony DeZuñiga (i) for ‘The Savage Sword of Conan’ #40 (Marvel, 1979).”
Source: twitter.com
Here is the cover of the issue:
Found in the issue entry at the Grand Comics Database..