Superman Unlimited (Superman Unlimited #5)

When the Kryptonite Kingdom faces a deadly terrorist attack from the Kobra Kult... this looks like a job for any hero other than Superman. The nation-state of El Caldero has the highest concentration of Kryptonite on the planet. It is literally the last place on Earth Superman should go, but when its people cry out for help, of course the Man of Steel will answer the call. Because he's Superman.