Ultimate X-Men #82

"THE UNDERNEATH" PART 1 (OF 2) After rejecting and shunning the X-Men, Nightcrawler is out on his own. Feared and hated for his appearance--he seeks refuge in the sewers, a subterranean safe-haven for mutants known as The Underneath, and the home of THE MORLOCKS

Image: Ultimate X-Men #82 - Marvel Comics

Ultimate X-Men #82