Without mentioning anything else, just the constant drop in temperature and the ever increasing concentration of the poison in the foggy mist were already highly deadly. In order for the companions to maintain warmth in their bodies with the freezing temperature, it called for a steady drain upon their spirit powers, and as to how long that depletion would go on for, none of them could be sure.
Along their passage, Qiao Chu had once tried to drink from the water sack he carried close to his body and as it had been placed against his body, it had not froze under the dismally low temperature. But as he drank from it, two water drops accidentally fell from the corners of his mouth and the drops immediately froze once they fell beyond where his spirit power encompassed, and two frozen solid ice beads then hit the ground.
