Shiz was a Jaredite military commander and the brother of Lib. After Coriantumr killed Lib at the plains of Agosh, Shiz took command of his brother’s army and continued the war against Coriantumr, the last Jaredite king (Ether 14:15-16). He pursued Coriantumr across the land, overthrew many cities, slew women and children, and burned the cities, so that a fear of Shiz spread throughout the land (Ether 14:17).
Shiz had sworn to avenge the blood of his brother on Coriantumr, and the record ties his refusal to stop to the word of the Lord through Ether that Coriantumr should not fall by the sword (Ether 14:24). When Coriantumr, having seen nearly two million of his people already slain (Ether 15:1-2), wrote offering to give up the kingdom if Shiz would spare the people, Shiz answered that he would spare them only if Coriantumr gave himself up to be slain with Shiz’s own sword (Ether 15:4; Ether 15:5). Coriantumr later wrote again, offering the kingdom for peace, and the wars continued (Ether 15:18).
In the final battles the armies on both sides were destroyed until only Coriantumr, Shiz, and a few men remained. After all the rest had fallen, Shiz had fainted from loss of blood and Coriantumr, resting on his sword, smote off Shiz’s head (Ether 15:28-29). Shiz then raised up on his hands and fell, struggled for breath, and died (Ether 15:30-31). His death left Coriantumr the sole survivor, fulfilling Ether’s prophecy that every soul of the people would be destroyed except Coriantumr (Ether 13:20-21).