The Uncanny X-Men #221 CGC 9.8 NM/MT comic book from 1987 features the first appearance of Mr. Sinister, a key issue in the X-Men universe written by Chris Claremont. Marc Silvestri's cover art showcases the characters of Mister Sinister and Wolverine, making it a highly sought-after collectible for fans of the Marvel Comics series. This vintage comic book from the Copper Age is graded by CGC and is a must-have for comic book enthusiasts looking to add to their collection of US Comics.