X-Men Vol. 1 (1963-1981) / The Uncanny X-Men Vol. 1 (1981-2011) #520

Plot

There's a rogue Predator X stalking mutants beneath New York City and it's down to Wolverine and Fantomex to hunt it down. There's an island in the San Francisco Bay that the mutants call home and it's slowly sinking—and only King Namor can save the day. And meanwhile, in San Francisco, a supermob is making life hard in Chinatown...somebody call the X-Men!