"The Return of the Blob"
Reprinted from X-Men (1963) #7.
At Magneto's strong-hold, the Brotherhood of Evil Mutants bicker. Professor X reveals his new invention, Cerebro to Scott. It is a machine that locates mutants, much like the Professor's natural power allows. The Professor also names Cyclops as team leader, as he announces that he will be absent for some time.
Magneto tracks down the amnesiac Blob at the circus and recruits him for the Brotherhood. Cerebro alerts the X-Men, and soon, the two groups face off. Magneto is callous in regards to the Blob's safety, and the Blob decides he wants nothing to do with either group. 22 pages (X-768).
Includes pin-up of original cover.