In Atlas/Marvel’s Mystic Comics #10 (April 1952), it becomes pretty clear that someone over at Atlas (perhaps a Mr. Stan Lee?) is really jealous of the attention that E.C. Comics is getting. Each story features a little blurb that pays homage to an E.C. comic book:
Cryptic Tales, Vault of Evil, Crypt of Shadows… I’m surprised there wasn’t a Haunt of Weird, too…