Uncanny X-Men #8
"The Uncanny Threat of Unus the Untouchable"
Written by Stan Lee
Drawn by Jack Kirby

I have no idea what it is about untouchable foes that fascinates Stan Lee. Unus is a play on the Blob, except instead of being unmoveable he is untouchable. At least Magneto realizes that he can't just let any flunkie join his group (apparently the Toad got grandfather claused in on that "you must prove yourself to me" requirement) and has Unus take on the X-Men to prove himself.

The real gold of this issue is the Beast, as he is the real star of the book. The seeds are being planted of his discontent with mutantkind as he seeks a normal life. But as he will find himself again and again, his only home is with the X-Men

C