Board Thread:Comics/@comment-31667040-20170404113118/@comment-1639863-20170405180834

This definitely sounds like House of Mystery Vol 1 or House of Secrets Vol 1. Although the second story is helpful for more clues, there's not really any keywords that narrow down the search in a broad sense.

I'll try to help with your search when I get the chance; I'm a little busy now. But, the best offer I can make at the moment would be to focus your search on those two series. I'd estimate you'd only have to look at the issues starting with 1975 or so to give yourself a decent window. Again, maybe our cover gallery for the series might jog your memory but, if not, go issue by issue seeing if we might have the story cataloged.