In remote antiquity, the four poles of the universe collapsed, the sky cracked open, the earth was no longer able to support everything, fire ran wild everywhere without ceasing, and flood overflowed out of control. Fierce beasts ate common people, and ferocious birds attacked the old and the weak. Hence, Nvwa smelted the five-colored stones to mend the sky, cut off the feet of the great turtle to support the four poles, killed the black dragon to help the earth, and gathered the ash of reed to stop the flood.