Appearing in "In the House of the Devil"
- Young Allies (First appearance)
- Secret Avengers
- Nomad (Rebecca Barnes) (Dream)
- Toro (Benito Serrano) (Dream)
- X-Men (Dream)
- Fantastic Four (Dream)
- Doctor Doom (Victor von Doom) (Dream) (Corpse)
- Spider-Man (Peter Parker) (Dream) (Corpse)
- Spider-Girl (Anya Corazon) (Dream) (Corpse)
- Gravity (Greg Willis) (Dream) (Corpse)
- Moon Knight (Marc Spector) (Dream) (Corpse)
- Marera Serrano (Mentioned)
- Roxxon employees
- Cuchillo (Corpse)
- God (Yahweh) (Invoked)
Races and Species:
- Earth-11041 (Dream)
- A Forest
- Fantastic Four Uniforms (Dream)
- Doctor Doom's Armor (Dream)
- Spider-Man's Suit (Dream)
- Moon Knight's Suit
- Black Widow's Suit and Gauntlets
- Ant-Man's Suit and Helmet
- Gravity's Datsun
Synopsis for "In the House of the Devil"
- Synopsis not yet written
Deep in the heart of Colombia, an immense and unmarked engine hums at a steady, ominous pace. Its purpose: to exploit a tear in the barrier between this world and another; to harvest and refine an exotic energy source for Roxxon Energy Corp. But just on the other side of that tear, inside the Negative Zone, a dark entity of vast power has been waiting for what has seemed like centuries, preparing for the moment when he can finally reach through the tear and once again cast his judgment on humans and mutants alike. For the psychomagnetic abomination called ONSLAUGHT, that moment is about to arrive...and he'll have the girl without a world--NOMAD--to thank for it! Eisner winner Sean McKeever and Filipe Andrade (X-23) team to bring you to the heart of terror and the edge of sanity in this hotly-anticipated epic!
- While the Young Allies never properly formed in their short-lived series, the individuals seem to act as a team in this issue (though not actively using the name Young Allies), so the team likely properly formed between this issue and their series.
- Also includes "Onslaught Saga", detailing the history of Onslaught.