Marvel's second Amazing Adventures was a split title featuring the Inhumans (initially both written and drawn by Jack Kirby, later drawn by Neal Adams) and the Black Widow (initially by writer Gary Friedrich and penciler John Buscema). The Widow was dropped after vol. 2, #8, and full-length Inhumans stories ran for two issues before that feature, too, was dropped.
Vol. 2, #11 (March 1972) introduced solo stories of erstwhile X-Men member the Beast, in which he was mutated into his modern-day blue-furred (originally grey-furred) form. The initial story was by writer Gerry Conway, penciler Tom Sutton, and inker Syd Shores. Steve Englehart became the feature's writer with issue #12 and added Patsy Walker and her then-husband, "Buzz" Baxter, to the Beast's supporting cast in issue #13.
In the fall of 1972, writers Englehart, Conway and Len Wein crafted a metafictional unofficial crossover spanning titles from both major comics companies. Each comic featured Englehart, Conway, and Wein, as well as Wein's first wife Glynis, interacting with Marvel or DC characters at the Rutland Halloween Parade in Rutland, Vermont. Beginning in Amazing Adventures vol. 2 #16 (by Englehart with art by Bob Brown and Frank McLaughlin), the story continued in Justice League of America #103 (by Wein, Dick Dillin and Dick Giordano), and concluded in Thor #207 (by Conway and penciler John Buscema). As Englehart explained in 2010, "It certainly seemed like a radical concept and we knew that we had to be subtle (laughs) and each story had to stand on its own, but we really worked it out. It's really worthwhile to read those stories back to back to back — it didn't matter to us that one was at DC and two were at Marvel — I think it was us being creative, thinking what would be really cool to do." The Beast's strip ended with vol. 2, #16 (Jan. 1973).
Following an issue that reprinted the backup features recounting the Beast's origin (edited from [Uncanny] X-Men #49-53, the title introduced the series "War of the Worlds" and its central character, Killraven, in vol. 2, #18 (May 1973). Created by co-plotters Roy Thomas and Neal Adams, scripter Conway, and pencilers Adams and Howard Chaykin, it was taken over by writer Don McGregor for an acclaimed run from vol. 2, #21 (Nov. 1973) to the final issue, vol. 2, #39 (Nov. 1976). Pencillers were Herb Trimpe, Rich Buckler, Gene Colan, and, most notably, P. Craig Russell from vol. 2, #27.
Its sister publication was Astonishing Tales. Additionally, plans were announced for a never-realized third split book featuring Doctor Strange and Iceman.