It is said that the twin sons of Jóhonaaʼéí descended from the sky to the top of , the Blue Bead Mountain, and came down the mountain on its south slope. They walked on to , which some call Warm Spring. There they found , the Holy Boy, and , Spirit Girl. "Where are you going?" asked Holy Boy. "We have come to find , the Big Giant," said the twins. "He is huge, and very powerful," said Holy Boy. "Each day he comes late in the day to , to drink from the lake." The next day at dawn the brothers walked to and stood beside the large lake. They took one of the chain lightning arrows their father had given them and shot it at a slab of high rock overhanging the base of Tsoodził. The arrow struck the rock with such force that it shattered and fell where it remains today. "With such weapons as these we cannot fail," they said.