Question: Which companion series to "House of Secrets" featured a fictional international crime cartel?

full_context: Document 1: House of Secrets (DC Comics): The House of Secrets is the name of several mystery, fantasy, and horror anthology comic book series published by DC Comics. It is notable for being the title that introduced the character Swamp Thing. It had a companion series titled "House of Mystery".
Document 2: House of Mystery: The House of Mystery is the name of several horror, fantasy, and mystery anthology comic book magazine series published by DC Comics. It had a companion series, "House of Secrets".
Document 3: House of Mystery (1934 film): House of Mystery is a 1934 American Pre-Code mystery horror film directed by William Nigh.
Document 4: Vicki Vale: Victoria "Vicki" Vale is a fictional character appearing in American comic books published by DC Comics, commonly in association with the superhero Batman. Created by Bob Kane and Bill Finger, the character debuted in "Batman" #49 (October 1948). Vicky Vale is typically depicted as a romantic interest of Bruce Wayne, the alter-ego of Batman.
Document 5: Joker (character): The Joker is a fictional supervillain created by Bill Finger, Bob Kane, and Jerry Robinson who first appeared in the debut issue of the comic book "Batman" (April 25, 1940), published by DC Comics. Credit for the Joker's creation is disputed; Kane and Robinson claimed responsibility for the Joker's design, while acknowledging Finger's writing contribution. Although the Joker was planned to be killed off during his initial appearance, he was spared by editorial intervention, allowing the character to endure as the archenemy of the superhero Batman.
Document 6: L. Miller &amp; Son, Ltd.: L. Miller & Son, Ltd. was a British publisher of magazines, comic books, and pulp fiction intended primarily to take advantage of the British ban on importing printed matter. Between 1943 and 1966, the firm published British editions of many American comic books, primarily those of Fawcett Comics. They are best known for the 1954 creation of Marvelman — a blatant imitation of the Golden Age Captain Marvel — after America's Fawcett Publications capitulated to National Periodicals (DC Comics). (The two companies had fought a long legal battle in which National claimed Captain Marvel infringed on Superman's copyright.) L. Miller & Son also published a large line of Western comics, many reprints but also some original titles.
Document 7: Horror Stories (magazine): Horror Stories was an American pulp magazine that published tales of the supernatural, horror, and macabre. The first issue was published in January 1935, three years after the weird menace genre had begun with "Dime Mystery Magazine". "Horror Stories" was a sister magazine to "Terror Tales", whose first issue came out a year earlier. The title went on to become one of the major pulp magazines of the 1930s.
Document 8: Haunted Love: Haunted Love was a horror-romance anthology comic book series published by Charlton Comics from 1973 - 1975. It was part of the Gothic Romance comic book mini-trend of the era, which included the short-lived DC Comics series "The Dark Mansion Of Forbidden Love" and "The Sinister House of Secret Love", and Atlas/Seaboard Comics' one-shot magazine "Gothic Romances". ("Haunted Love" was also part of Charlton's wave of early 1970s horror-themed titles, including "Ghostly Haunts", "Haunted", "Midnight Tales", and "Scary Tales".)
Document 9: Batman: Batman is a fictional superhero appearing in American comic books published by DC Comics. The character was created by artist Bob Kane and writer Bill Finger, and first appeared in "Detective Comics" #27 (1939). Originally named the "Bat-Man", the character is also referred to by such epithets as the Caped Crusader, the Dark Knight, and the World's Greatest Detective.
Document 10: Crime Syndicate of America: The Crime Syndicate are teams of fictional supervillains from one of DC Comics' parallel universes, who are the evil counterparts of the Justice League of America. The original team was specifically known as Crime Syndicate of America and is sometimes abbreviated as CSA. This first superpowered Crime Syndicate team appeared in "Justice League of America" (vol. 1) #29 in August 1964. The primary successive incarnation, known as the Crime Syndicate of Amerika (with the variant spelling of America), first appeared in the 2000 "" graphic novel.
Document 11: Sandman Mystery Theatre: Sandman Mystery Theatre is a comic book series published by Vertigo, the mature-readers imprint of DC Comics. It ran for 70 issues between 1993 and 1999 and retells the adventures of the Sandman, a vigilante whose main weapon is a gun that fires sleeping gas, originally created by DC in the Golden Age of Comic Books. In a similar vein to Batman, the Sandman possesses no superhuman powers and relies on his detective skills and inventions.
Document 12: Vulture (DC Comics): VULTURE is a fictional international crime cartel in the DC Comics universe. VULTURE first appears in "House of Mystery" #160 (July 1966), and was created by Jack Miller and Joe Certa.
Document 13: Destiny (DC Comics): Destiny is a DC Comics character created by Marv Wolfman and Bernie Wrightson, first appearing in "Weird Mystery Tales" #1 (1972), and was regular host of that series for the first fourteen issues, after which he hosted "Secrets of Haunted House". He is one of the Endless in Neil Gaiman's comic book series, "The Sandman". In "The Sandman Special" #1, he was also referred to by his Greek name, Potmos. In 1997, he starred in an eponymous three-issue limited series written by Alisa Kwitney.
Document 14: DC Comics Graphic Novel Collection: DC Comics Graphic Novel Collection is a fortnightly partwork magazine published by Eaglemoss Collections and DC Comics. The series is a collection of special edition hardback graphic novels, collecting significant DC Comics superhero story-arcs as well as bonus origin stories for the characters within.
Document 15: DC Comics: DC Comics, Inc. is an American comic book publisher. It is the publishing unit of DC Entertainment, a subsidiary of Warner Bros. Entertainment, Inc., a division of Time Warner. DC Comics is one of the largest and oldest American comic book companies, and produces material featuring numerous well-known heroic characters including Superman, Batman, Wonder Woman, Green Lantern, the Flash, Aquaman, Hawkman, and Green Arrow. Most of their material takes place in the fictional DC Universe, which also features teams such as the Justice League, the Justice Society of America, the Suicide Squad, and the Teen Titans, and well-known villains such as the Joker, Lex Luthor, The Cheetah, Harley Quinn, Darkseid, Catwoman, Ra's al Ghul, Deathstroke, Reverse-Flash, Sinestro, Black Adam, and Brainiac. The company has also published non-DC Universe-related material, including "Watchmen", "V for Vendetta", and many titles under their alternative imprint Vertigo.
ground_truth: House of Mystery