- Script
- Scott Lobdell (plotter); Mark Waid (plotter, scripter)
- Pencils
- Adam Kubert; Joe Bennett
- Inks
- Dan Green; Art Thibert; Tim Townsend; Jesse Delperdang
- Colors
- Steve Buccellato; Team Bucce
- Letters
- Richard Starkings; Comicraft
- Genre
- superhero
- Characters
- X-Men [Professor X; Cyclops; Jean Grey; Storm; Wolverine; Bishop; Gambit; Cannonball; Iceman; Rogue; Joseph]; The Watcher; Hulk; Namor, the Sub-Mariner; X-Man; Cable; Dr. Doom; Fantastic Four [Mr. Fantastic; Invisible Woman; Human Torch [Johnny Storm]; The Thing]; Franklin Richards; Avengers [Captain America [Steve Rogers]; Iron Man [Tony Stark]; Thor; Vision; Scarlet Witch; Wasp; Giant Man [Hank Pym]; Hawkeye; Black Panther; Crystal; Quicksilver; Falcon; Black Widow; Onslaught (villain); Apocalypse (villain); Foggy Nelson (cameo); Karen Page (cameo); Jarvis (cameo); J. Jonah Jameson (cameo); Robbie Robertson (cameo); Trish Tilby (cameo); Willie Lumpkin (cameo)
- Synopsis
- The Marvel heroes join the X-Men in an all-out attack on Onslaught. Many of the non-mutant heroes sacrifice themselves to beat their foe. The battle is won but at the ultimate cost.
- Reprints
Continued in the "Heroes Reborn" books and most Marvel Universe comics.