These days there are strict rules for returning original art to the artists after the publishers are finished with it. We have Neal Adams to thank for the fact that art is no longer warehoused, shredded, given away by editors, or turned over and used as paste-up boards for house ads like this oversize Alex Toth original from 1963.
Someone took a black grease pencil or China marker and drew big "X"s across the front and glued stats to the back for an ad.
It's a shame, because Toth's art is beautiful. He inked it with real India ink, not the less-than-permanent markers he started using almost exclusively a few years later. There are some really effective dry brush textures on the cape in the last panel as well as the explosion in the panel before it. Toth lettered the sound effects but the rest of the text is by another hand. Nice art, given to me many years ago by inker extraordinaire John Nyberg.