UNCANNY X-MEN #19: Lo! Now shall appear... The Mimic!

...And in this corner, hailing from New York City, featuring the combined power of all six X-Men... "The Mimic," Caaaaaaaalvin Rankiiiiiiiiiiin!!!

UNCANNY X-MEN #18: If Iceman Should Fail--!

Iceman must stand alone against the might of a returning Magneto, who will stop at nothing to birth his own race of mutant superslaves!

UNCANNY X-MEN #17: ...And None Shall Survive!

Still reeling from their battle with the Sentinels, the X-Men face a mysterious enemy who fells them one by one in their own home!

UNCANNY X-MEN #16: The Supreme Sacrifice!

The X-Men must discover a way to defeat the deadly Sentinels, or else mutantkind is doomed... and so is humankind. Basically it would be bad news for everybody.

UNCANNY X-MEN #15: Prisoners of the Mysterious Master Mold!

The X-Men infiltrate the base of the Sentinels, who yearn to hear more of this thing you call... flashbacks.