Excalibur (1988) #79

The Douglock Chronicles: Part 2 of 3 – “Twisted Logic!” Guest-starring Professor X. Story by Scott Lobdell and Chris Cooper. Art by Ken Lashley and Harry Candelario. The mysterious mutant Zero takes Excalibur and those under their protection to an old secret base that once belonged to the mutant tyrant Stryfe. Meanwhile, Charles Xavier and Moira MacTaggert make a startling discovery about the Legacy Virus that could mean the end of mankind.

32 pages, FC. Cover price $1.95. (Note: publisher’s reference picture, not an actual scan)