Uncanny X-Men (1963) #507

The secret of the Cooperstown Massacre goes worldwide and anti-mutant hysteria explodes nationwide. If Scott and Emma don't trust each other, how can mutantkind keep it together? Beast and the newly-assembled science team fight for their lives on Hokkaido Island...and the Angel's deepest, darkest secret is revealed to all present. Uh-oh. Innocent lives are trapped between the Russian mob and everybody's favorite heartbroken mutant Colossus, fighting along against old-world horrors that have followed him here. Oh! And the Sisterhood is finally assembled and ready to destroy the X-Men once and for all.
Rated T+ ...$2.99