First appearance of Mister Sinister
Uncanny X-Men #221 (1987) – The First Appearance of Mister Sinister
Published by Marvel Comics | Written by Chris Claremont | Art by Marc Silvestri
A pivotal issue in X-Men history! Uncanny X-Men #221 marks the first full appearance of Mister Sinister, one of the team’s most iconic and mysterious villains. Written by legendary scribe Chris Claremont with dynamic art by Marc Silvestri, this 1987 issue brings the Marauders back into the spotlight as tensions rise within the mutant ranks.
The story follows the X-Men as they confront the deadly aftermath of the Morlock Massacre, while hints of Sinister’s shadowy influence begin to unfold. Packed with action, sharp dialogue, and unforgettable art, this issue is a cornerstone of late ’80s X-Men storytelling — a must-have for collectors and fans of mutant lore.
Publisher: Marvel Comics
Release Year: 1987
Key Issue: First appearance of Mister Sinister
Writer: Chris Claremont
Artist: Marc Silvestri