Fantastic Four #185 (1977)

"Here There Be Witches!" Written by Len Wein. Pencils by George Perez. Inks by Joe Sinnott. Cover by George Perez and Joe Sinnott. The Fantastic Four hop in the pogo-plane and fly to New Salem, Colorado in search of young Franklin. The quaint little town of New Salem seems very quiet and peaceful upon their arrival, but appearances can be deceiving! One thing leads to another, and our heroes find themselves knee deep in gargoyles and witches!

Key book; first appearance of Nicholas Scratch.