Ether 13:21

otherwise they should be destroyed, and all his household, save it were himself, and he should only live to see the fulfilling of the prophecies which had been spoken concerning another people receiving the land for their inheritance; and Coriantumr should receive a burial by them; and every soul should be destroyed save it were Coriantumr.

If not, they would be destroyed. All his household would be destroyed except for him. He would only live to see the prophecies come true. Those prophecies were about another people receiving the land. Coriantumr would receive a burial by them. Every person would be destroyed except for Coriantumr.

But if not, they would all be destroyed except for Coriantumr himself. He would live just long enough to see another people inherit the land—and those people would bury him. Every soul would be wiped out except him.