HOUSE OF M UNIVERSE was bourne out of a 2005 crossover event storyline from Brian Michael Bendis and Marvel involving not only the X-titles but also all of the main Marvel Universe titles. Publications included a main 8-issue mini-series with the title HOUSE OF M and multiple tie-in issues among ongoing series as well as tie-in mini-series with sub-titles. The story revolved around the Scarlet Witch using her powers to warp the fabric of reality to bring back her lost children. The new reality replaced the Marvel Universe proper during the event, until everything reverted back to normal. Much like the 'Age of Apocalypse,' the 'House of M' alternate reality was later retconned to be a persistent alternate universe (Earth-58163) in the Marvel Multiverse. Several follow-up mini-series were published in the 2007-2008 timeframe and the House of M Universe appeared in 2015's Secret Wars event as a section of Battleworld.