Mister X (Marvel, from Wolverine)
Mister X (Marvel, from Wolverine) appears in 16 issues in grailworth's catalog, and was first published in 2001. First appearance: Wolverine #159 (1988), cover dated 2001.
First appearance
Origin
Every appearance we value
Secret Warriors (2009) 1 issue
Character appearances from the Grand Comics Database, CC BY-SA 4.0.