The conclusion of "Critical Mass," a 2-part story featuring the Silver Age JLA! Green Lantern Hal Jordan, Flash Barry Allen, Hawkman, Aquaman, and Zatanna are growing exponentially, destroying anything--and everything--in reach! The whole planet is in serious trouble, and it's up to Green Arrow and Batman to save the day. But what can ordinary humans do to hold back five rampaging metahuman giants?