Comic Title: House of Mystery #156
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: January 1966
On Sale Date: November 18, 1965 Newsstand Date November 18, 1965
Source: House Ad, Our Fighting Forces #97, Page 6

Copyright Date November 18, 1965
Source: Library of Congress, Periodicals 1965

Frequency: Monthly, with the exception of February, May, August and November
Cover Price: $0.12
Page Count: 32
Editor: Jack Schiff

Title: "Look What Happened to J'onn J'onzz"
Pages: 11

Feature(s):
Martian Manhunter (of Earth-1)

Writer: Jack Miller
Artist: Joe Certa

Reprinted In:
Showcase Presents:Martian Manhunter Vol. 2 TPB (2009)

Feature Character(s)

• Martian Manhunter (last appearance in Justice League of America #41; next appearance in House of Mystery #157)

Supporting Character(s)

• Zook (last appearance in House of Mystery #151; next appearance in House of Mystery #157)

Villain(s)

• The Idol-Head of Diabolu (behind-the-scenes; last appearance in House of Mystery #155; next appearance in House of Mystery #158)
• The Cobra-Beast (no further appearances)

Synopsis:
Another menaces arises from the Idol-Head of Diabolu. This time the menace is in the form of a giant cobra. Zook looks the beast up in the legend of Diabolu and discovers only an alien can defeat the creature, but at the cost of vanishing himself. He warns J'onn before the Manhunter touches the creature. J'onn then tries long range attacks, which fail to halt the creature's rampage. J'onn finally engages the creature in a physical battle. As the legend predicted J'onn disappears. However, he was absorbed into the creature. J'onn is then able to use his shape-shifting power to revert himself, now combined with the creature, into his normal form.