The lord of Xibalba is later defeated by those characters in a ball game, causing them to gain the moniker "The Hero Twins".  
The first part of this work begins, "This is the account of how all was in suspense, all calm, in silence" , and goes on to discuss how "Tepeu and Gucumatz came together; then they conferred about life and right".  In the third part of this work, Balam-Quitze and Naught travel to Tulán Zuiva, where a fire is put out by a hailstorm after it was given to those characters by Tohil.  In the second section of this work, the skull of Hun Hunahpú impregnates Xquic, who later gives birth to Hunahpú and Xbalanqué.  The lord of Xibalba is later defeated by those characters in a ball game, causing them to gain the moniker "The Hero Twins".  For 10 points—name this central religious text of the Mayans.
The first part of this work begins, "This is the account of how all was in suspense, all calm, in silence" , and goes on to discuss how "Tepeu and Gucumatz came together; then they conferred about life and right".  
{Popol Vuh}