X-Men #38

Published in November 1967, X-Men #38 emerged during a transitional period for the title as it grappled with flagging sales and shifting creative direction. This issue serves as a standalone story featuring the team battling the iconic villain Unus the Untouchable, reflecting the standard 'monster-of-the-month' approach that defined much of the early run before the series gained greater thematic depth in later years.

The issue features cover art by George Tuska and interior illustrations by Don Heck, who were tasked with maintaining the aesthetic established by Jack Kirby and Werner Roth. While this period is often overshadowed by the later rejuvenation of the X-Men franchise in the 1970s, the design remains a faithful representation of the Silver Age Marvel style, emphasizing dynamic action and the burgeoning interpersonal drama that would eventually become the hallmark of the X-Men mythos.