| Issue | #21 |
| Published | June 1989 |
| Cover Price | 1.25 USD; 1.75 CAD |
| Pages | 36 |
| Editing | Terry Kavanagh; Michael Rockwitz (Assistant); Tom DeFalco (editor-in-chief) |
| Characters | Cyclops; Black Panther; Paladin; The Thing |
| Genre | superhero |
| Pencils | Walter Simonson (signed) |
| Inks | Walter Simonson (signed) |
| Letters | typeset |
| Notes | Wraparound cover |
| Characters | Cyclops; Callisto; Moira MacTaggert; Master Mold [Stephen Lang]; Conscience; Cameo flashbacks of Jean Grey; Iceman; Beast; Archangel; Storm; Wolverine; Colossus; Rogue; Psylocke; Dazzler; Longshot; Havok; Albert Einstein; Leonardo da Vinci |
| Genre | superhero |
| Script | Bob Harras |
| Pencils | Ron Lim |
| Inks | Carol Riem |
| Colors | Andy Yanchus |
| Letters | Agustin Mas |
| Reprinted | in Cyclops: Retribution (Marvel, 1994 series) #nn |
| Characters | the Black Panther |
| Genre | superhero |
| Script | Don McGregor |
| Pencils | Gene Colan |
| Inks | Tom Palmer |
| Colors | Mike Rockwitz |
| Letters | Joe Rosen |
| Reprinted | in Silver Surfer (Play Press, 1989 series) #6 |
| Characters | Paladin |
| Genre | superhero |
| Script | Scott Lobdell |
| Pencils | Ron Wilson |
| Inks | Dan Adkins |
| Colors | John A. Wilcox |
| Letters | Diana Albers |
| Characters | The Thing; The Ripper |
| Genre | superhero |
| Script | Marc McLaurin |
| Pencils | Kevin Van Hook |
| Inks | David Day; Dan Day |
| Colors | Marc McLaurin |
| Letters | Agustin Mas |
| Characters | Cyclops; Black Panther; Starfox; Wolfsbane [Rahne]; Mirage [Dani Moonstar] |
| Genre | superhero |
| Pencils | Marshall Rogers |
| Inks | Terry Austin |
| Letters | Typeset |
| Notes | Presents cover art for next issue. |