Fantastic Four #157 (1975)

"And Now The Endgame Cometh!"  Script by Roy Thomas. Art/cover by Rich Buckler and Joe Sinnott.

Dr. Doom’s master plan is revealed! Steal the power of the Silver Surfer, transfer it to a new giant Doomsman android, and unleash the Doomsman on the unsuspecting Fantastic Four! However, there is an even more sinister being manipulating the events inside Castle Latveria! Who is the target of Mephisto's wrath?

Guest-starring the Silver Surfer. Good condition.