"Now Strikes...the Sub-Human!"
A sub-human creature roams the subways, lost and confused until he remembers he was a prince of a great underworld empire that was wiped out by a volcano. Swearing revenge on the surface dwellers, the sub-human plots to destroy humanity. Meanwhile, Dr. Hunt unveils his earth tremor machine to the BOD of the college. As he gives them a sample of what it can do, it shakes the Sub-Human who climbs back to the surface to find the machine and use it against humanity.
The origin of Grotesk the Sub-Human. Back-up feature continues the origin of Cyclops in part 4 of the Origins of the X-Men series.